Abstract:
The invention discloses a locator unit contained within footwear providing a method for GPS position determination and transmission of said location determination data to a central monitoring station which disseminates the data through the use of proprietary software, wireless communications, land based wire systems and the Internet.

Description:
CROSS- REFERENCE TO MULTIPLE REISSUE APPLICATIONS   
     Notice: More than one reissue application has been filed for the reissue of U.S. Pat. No.  6 , 788 , 200 . The reissue applications are U.S. application Ser. No.  11 / 494 , 751  ( the present application ) , U.S. application Ser. No.  11 / 506 , 175 , U.S. application Ser. No.  11 / 516 , 805 , and U.S. application Ser. No.  11 / 517 , 603 , all of which are divisional reissues of U.S. Pat. No.  6 , 788 , 200 .   
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates generally to footwear and, more specifically, to a locator unit contained within footwear providing a method for GPS position determination and transmission of said location determination data to a central monitoring station which disseminates the data through the use of proprietary software and the Internet. 
     The footwear in the preferred embodiment contains the electronic circuitry in the mid sole of the shoe having GPS location determination unit and transponder whereby a remote location can determine the position of the wearer of said footwear having said device. 
     Furthermore, the present invention provides for additional elements by having the GPS unit and transponder contained within a socket positioned within the heel of the shoe. 
     The location component can be selectively inserted and or removed from the midsole or heel. 
     The socket in the midsole is comprised of a throughbore having spaced apart sidewalls and a top wall having retaining means positioned on each sidewall. 
     The heel socket is comprised of spaced apart sidewalls, top wall, a back wall and frontal aperture with the location of the socket preferably in the instep or heel of the shoe. 
     The insertable removable component has means for engaging the sidewalls of the receptacle and closure means for securing the component within said receptacle. Furthermore, the component can form a compartment for the inclusion of a GPS receiver and transponder for locating the wearer of said shoes. 
     The present invention provides for another additional element wherein the position determination component is contained within the tongue of the footwear. 
     In addition, to the electronic circuitry being embedded in the tongue of the shoe the antenna can be contained within a logo prominently placed on the tongue of the shoe which will increase the effectiveness of the device. 
     While the preferred embodiment of the present invention provides for an unobtrusive concealed locator device contained within the body of the shoe, it additionally provides for the attachment of a positioning determining device and transponder for transmitting the location data on demand in a module that can be releasably attached to the exterior of the shoe by means of the shoelaces or hook and loop material to the back of the footwear. 
     2. Description of the Prior Art 
     There are other receptacles designed for footwear. Typical of these is U.S. Pat. No. 1,597,823 issued to Randolph on Aug. 31, 1926. 
     Another patent was issued to Agrillo on Aug. 28, 1956 as U.S. Pat. No. 2,760,278. Yet another U.S. Pat. No. 2,897,609 was issued to Bodkin on Aug. 4, 1959 and still yet another was issued on Oct. 27, 1987 to Dassler as U.S. Pat. No. 4,703,445. 
     Another patent was issued to Ormanns et al. on Sep. 26, 1989 as U.S. Pat. No. 4,870,700. Yet another U.S. Pat. No. 5,473,518 was issued to Haber et al. on Dec. 5, 1995. Another was issued to Goldston et al. on Feb. 15, 1994 as U.S. Pat. No. 5,285,586 and still yet another was issued on Sep. 17, 1996 to Musa as U.S. Pat. No. 5,557,259. 
     Another patent was issued to McCarthy on Nov. 12, 1996 as U.S. Pat. No. 5,574,432. Yet another U.S. Pat. No. 5,655,316 was issued to Huang on Aug. 12, 1997. Another was issued to Ingargiola et al. on May 5, 1998 as U.S. Pat. No. 5,748,087 and still yet another was issued on Oct. 26, 1999 to Inman as U.S. Pat. No. 5,970,631. 
     Another patent was issued to Robinson on Jan. 11, 2000 as U.S. Pat. No. 6,012,822. Yet another U.S. Pat. No. 6,014,080 was issued to Layson, Jr. on Jan. 11, 2000. Another was issued to James on Jun. 19, 2001 as U.S. Pat. No. 6,247,251. 
     U.S. Pat. No. 1,597,823 
     Inventor: Simon Randolph 
     Issued: Aug. 31, 1926 
     In combination with a shoe including a heel section formed with an opening extending longitudinally of the shoe and opening at the front and rear walls of the heel, a lining disposed in said opening and including a rear wall for closing the opening at the rear of the heel, a self-contained electrically operated illuminating means disposed inwardly of the lining in a manner whereby the light rays therefrom will project from the opening at the front of the heel, normally spaced apart contact arms disposed inwardly of the rear wall of the lining, and means carried by the rear wall of the lining, and means carried by the real wall of the lining for moving the contact arms into engagement with one another for completing the circuit through the illuminating means. 
     U.S. Pat. No. 2,760,278 
     Inventor: Paul Agrillo 
     Issued: Aug. 28, 1956 
     A shoe, the combination which comprises a sole, an upper mounted on the sole, a heel supporting the rear portion of the sole in an elevated position, a wearing sole covering and secured to the lower surface of the heel and extended forwardly to a point spaced from the toe, said wearing sole being secured to the lower surface of the forward portion of the shoe and the heel portion being flush with side surfaces of the heel of the shoe, a wedge-shaped pad positioned in and substantially filling the area between the forward surface of the heel and point of intersection of the lower surface of the sole of the shoe and upper surface of the wearing sole, said wedge-shaped pad having a substantially semi-spherical opening in the intermediate part, a substantially hemispherical balancing element with a vertically disposed opening therethrough positioned in the hemispherical opening of the pad, and a coil spring positioned in the opening of the balancing element and extended from the sole of the shoe to the inner surface of the wearing sole. 
     U.S. Pat. No. 2,897,609 
     Inventor: Lawrence E. Bodkin 
     Issued: Aug. 4, 1959 
     A shoe having a sole member including an integral heel portion, an arcuate guard element affixed to the heel portion of said sole member and depending therefrom and forming therewith a walled socket having an opening, a movable heel member fitting said socket, said movable heel member having a forward end and a rearward end, a hinge attaching said forward end to said sole member, said opening being positioned and proportional to pass said movable member into and out of said socket as said movable member is swung on said hinge, releasable friction catch means carried by and disposed within said socket and cooperative catch means when said movable member is in housed position in said socket, said catch means being disposed spaced from the axis of said hinge, said movable member having a surface portion engaging a portion of the wall of said socket and having a storage chamber opening through said surface portion and normally closed by said socket wall portion when said movable ember is housed in said socket and accessible when said movable member is swung from said socket. 
     U.S. Pat. No. 4,703,445 
     Inventor: Armin A. Dassler 
     Issued: Oct. 27, 1987 
     An athletic shoe system for running disciplines and a process for emitting and or exchanging information concerning movement factors of running disciplines enabling the athlete to always be sufficiently informed regarding his her training program that is in progress or completed. In particular, in an area of the sole that is less stressed during use, at least one free space is provided where a transmitter is housed which, via a sensor provided in the sole, can emit at least one output signal. In accordance with preferred embodiments, a transmitter in a first shoe of a pair of shoes receives the signals from the sensor and transmits emissions in correspondence with their receipt. The transmitted emissions are received by a remote receiver, that is linked with a computer, and the remote receiver receives the transmitted emissions directly from the transmitter of the first shoe and indirectly via a receiver and transmitter of a second shoe of the pair. The computer determines the distance between the first and second shoes, on the basis of the delay between receipt by the remote receiver of the directly and indirectly received emissions, as well as other characteristic values related to stride rate or length. 
     U.S. Pat. No. 4,870,700 
     Inventor: Siegfried Ormanns 
     Issued: Sep. 26, 1989 
     The personal safety radio device is carried by the person to be protected on a mounting device, for instance incorporated in the heel of a work shoe, and includes a transmitter powered by a current source specific to the device, a receiver and an antenna arrangement. In order to ensure a high operational reliability and a long maintenance-free service life at a high range of transmission the device- specific current source is a rechargeable accumulator which may be charged by a generator arrangement including a piezo-electric converter during the operational usage of the device. The piezo-electric converter is so arranged in the work shoe that it is acted on by the weight of the person wearing the work shoe and thus converts the pressure of the weight into electrical energy. 
     U.S. Pat. No. 5,473,518 
     Inventor: Terry M. Haber 
     Issued: Dec. 5, 1995 
     A flashing light housing that is adapted to be removably attached to the rear (i.e. heel) of any shoe, such as, for example, a sneaker, sport shoe, training shoe, or the like, without requiring factory alterations to the shoe. A manually accessible light control switch is operable by the wearer to selectively control the energization of a flashing light source that is carried at the interior of the housing. An attachment hook extends from the housing to fit over the top of and around the heel of the shoe, whereby the housing will be suspended from the heel. A resilient attachment band is connected to and extends outwardly and in opposite directions from the flashing light housing. The attachment band is adapted to be fastened to the sole of the shoe at each of a first side and an opposite side thereof, whereby to hold the housing against the heel. By virtue of the foregoing, the flashing light housing is characterized by a large viewing area that is easily visible to on-lookers. 
     U.S. Pat. No. 5,285,586 
     Inventor: Mark R. Goldston et al. 
     Issued: Feb. 15, 1994 
     An athletic shoe ( 20 ) includes a sole ( 22 ), an upper ( 25 ), and a tongue ( 26 ), as well as fasteners ( 28 ), such as shoelaces. Incorporated into the sole ( 22 ) of the athletic shoe ( 20 ) is a receptacle ( 30 ) for receiving and retaining a plug-in module ( 32 ) in a slide-in, releasably locking arrangement. The plug-in module ( 32 ) preferably includes a battery ( 62 ), a light emitting device ( 54 ), and electrical circuit elements ( 58 ,  60 ,  72 ) arranged to selectively connect the battery ( 62 ) to the light emitting device ( 54 ). 
     U.S. Pat. No. 5,557,259 
     Inventor: John S. Musa 
     Issued: Sep. 17, 1996 
     A proximity alert and direction indicator is provided that allows an observer to monitor the proximity of a subject under surveillance, particularly a child. The subject wears a transmitter removably attached to the shoe. The observer wears a receiver-containing bracelet. The receiver contains a proximity detector with threshold set that emits an audible sound when the distance between the subject and the observer exceeds some preset distance. The receiver also contains a direction finder with graphic display that shows the observer the direction to the subject. 
     U.S. Pat. No. 5,574,432 
     Inventor: Steven R. McCarthy 
     Issued: Nov. 12, 1996 
     An apparatus attachable to a shoe for deploying a rescue signal includes a base attachable to a rear section of a conventional shoe. The base comprises straps coupled to a lower extent thereof and extended horizontally therefrom. The strips each have a plurality of buttons coupled thereto. The base also comprises a slot formed on an top surface thereof. Also included is a restraining unit adapted to secure about an upper extent of the shoe. The restraining unit comprises an annular band adapted to slidably insert within the slot of the base. The restraining unit further includes a pair of generally triangular members attached to the band and extended downwardly therefrom. The triangular members each have a plurality of buttonholes coupleable to the buttons disposed on the strips of the base. A metal rod is adapted to insert within a lateral bore formed in a heel of the shoe and further within a pair of apertures formed in the strips. Finally, a signaling mechanism situated within the base deploys a rescue signal upon the manual activation thereof or upon the failure to respond to an alarm adapted to indicate the cessation of a predetermined amount of time. 
     U.S. Pat. No. 5,655,316 
     Inventor: Tien-Tsai Huang 
     Issued: Aug. 12, 1997 
     A shoe including a shoe body having an outsold and an upper fastened to the outsole; an insole formed as an air bag filled with air and mounted within the outsole; a pressure inductor connected to the insole to detect the pressure applied to the insole; a circuit board mounted in the insole and consisting of a pressure converter and a microprocessor, and pressure converter converting the pressure detected by the pressure inductor into a frequency signal to be processed by the microprocessor so that the microprocessor obtains a value corresponding to the pressure applied to the insole; and a liquid crystal display connected to the microprocessor to display the value obtained by the microprocessor. 
     U.S. Pat. No. 5,748,087 
     Inventor: Ingargiola et al. 
     Issued: May 5, 1998 
     Articles of footwear incorporating one or more sliding elements are described. Such articles include shoes, sandals, boots, and appliances for attachment to any or all of the foregoing. In addition to serving the traditional functions of footwear lacking such sliding elements, such footwear can be used for recreational “grinding,” or sliding across hard surfaces having edges, corners, etc. 
     U.S. Pat. No. 5,970,631 
     Inventor: David G. Inman 
     Issued: Oct. 26, 1999 
     Articles of footwear incorporating one or more sliding elements are described. Such articles include shoes, sandals, boots, and appliances for attachment to any or all of the foregoing. In addition to serving the traditional functions of footwear lacking such sliding elements, such footwear can be used for recreational “grinding,” or sliding across hard surfaces having edges, corners, etc. 
     U.S. Pat. No. 6,012,822 
     Inventor: William J. Robinson 
     Issued: Jan. 11, 2000 
     A light flasher for an article of apparel includes one or more lamps that produce light visible from the exterior of the apparel. A switch, which may be of the mechanical or electronic variety, causes a switch closure responsive to motion of the apparel. A circuit, attached to the switch and the light, causes the lights to illuminate in a series of random duration flashes for a predefined time interval in response to the closure of the switch. 
     U.S. Pat. No. 6,014,080 
     Inventor: Hoyt M. Layson, Jr. 
     Issued: Jan. 11, 2000 
     Tamper resistant body-worn tracking device to be worn by offenders or potential victims for use in a wireless communication system receiving signals from a global positioning system (GPS). The tracking device directly communicates spatial coordinates to multiple remote sites. The tracking device is an enclosed case worn on a limb of a person. The case contains a battery, a signaling device, and a circuit board containing a field programmable gate array, a wireless data modem, a conventional GPS receiver, and a matched filtering GPS receiver. 
     U.S. Pat. No. 6,247,251 
     Inventor: Brent James 
     Issued: Jun. 19, 2001 
     A grind shoe apparatus incorporating a variable friction grind plate complementally received in the recess of the shoe sole and having a downwardly facing trough and an outwardly facing rail with respective slide surfaces for contacting a support surface to slide therealong. Such plate further includes at least one speed control compartment positioned within one of such slide surfaces and having an insert removably carried therein for varying the frictional resistance occurring during sliding maneuvers. 
     While these devices may be suitable for the purposes for which they were designed, they would not be as suitable for the purposes of the present invention, as hereinafter described. 
     SUMMARY OF THE PRESENT INVENTION 
     The present invention relates generally to location detection systems and, more specifically, to personal safety systems including a device that can be activated upon attachment or on demand and able to determine and transmit data related to the location of the device for monitoring at a central monitoring station which disseminates the data through the use of proprietary software, wireless communications, wire based land communications and the Internet. 
     The personal safety system includes a central monitoring station and at least one locator device. The locator device includes a GPS position device for generating location data regarding said device and transponder for wirelessly transmitting the location data to the central monitoring station. 
     The transponder has a receiver for receiving a location request signal from the central monitoring station, whereby the transponder generates a response signal including location information upon receipt of the location request signal. The central monitoring station disseminates the data through the use of proprietary software, wireless communications, wire based land communications and the Internet. 
     The locator device of the present invention can be incorporated into footwear forming an integral part therewith and in the preferred embodiment is a module that can be inserted into a preformed socket contained within footwear. Said socket preferably made either in the midsole or heel of the footwear. 
     The present invention additionally provides for the locator unit to be placed within the tongue of the footwear. 
     A primary object of the present invention is to provide a system for locating an individual that will overcome the shortcomings of prior art devices. 
     A further object of the present invention is to provide a system for locating an individual which is able to be remotely activated to initiate a location mode for determining the location of the locator unit. 
     A yet further object of the present invention is to provide a system for locating an individual wherein a central station is able to determine the location of a locator unit upon receipt of a location request. 
     A still further object of the present invention is to provide a system for locating an individual wherein the locator units are assigned a unique identification number. 
     Another object of the present invention is to provide a system including a unique identification code which is used to request information on the location of the locator unit and thus determine the location of the person or object to which the device is attached. 
     Yet another object of the present invention is to provide a system for locating an individual wherein the central station may continuously monitor via wireless communication devices said locator unit. 
     Still yet another object of the present invention is to provide a locator unit which is able to be easily attached to an object and relay location information to a central monitoring unit. 
     A further object of the present invention is to provide a personal safety device having means for wirelessly transmitting location data to the central monitoring station. 
     A yet further object of the present invention is to provide a personal safety device which is activated upon attachment to the person and able to provide information regarding location of the locator unit. 
     A still yet further object of the present invention is to provide footwear having the locator unit contained therein and forming an integral part therewith. 
     Another object of the present invention is to provide a modular locator unit including GPS location determination device, transponder and antenna. 
     Yet another object of the present invention is to provide a modular locator unit that can be inserted and removed from a socket formed within footwear. 
     Still yet another object of the present invention is to provide footwear having GPS location determination unit contained therein. 
     A further object of the present invention is to provide footwear having a transponder contained therein. 
     A yet further object of the present invention is to provide footwear having an antenna contained therein. 
     A still yet further object of the present invention is to provide footwear having a socket for the insertion therein of a locator module. 
     Another object of the present invention is to provide footwear having a locator module preferable positioned within the instep or heel of the shoe. 
     Yet another object of the present invention is to provide footwear having a socket with spaced apart walls with locator module engaging members for retaining the positioning of said module. 
     Still yet another object of the present invention is to provide footwear having a rear wall and frontal aperture for receiving a locator module having closure engaging means. 
     A further object of the present invention is to provide footwear having a socket for receiving a component that forms an integral part of said footwear. 
     A yet further another object of the present invention is to provide footwear having a component including a locator unit incorporated therein for determining the location of the wearer. 
     A still yet further object of the present invention is to provide footwear having a component that can have a transponder for remotely querying the transponder for the GPS data. 
     Another object of the present invention is to provide a unit having a positioning determining device and transponder for querying for the positioning data from a module that can be exteriorly attached to a shoe. 
     Yet another object of the present invention is to provide a system for locating an individual that is simple and easy to use. 
     Still yet another object of the present invention is to provide a system for locating an individual that is economical in cost to manufacture. 
     Additional objects of the present invention will appear as the description proceeds. 
     To the accomplishment of the above and related objects, this invention may be embodied in the form illustrated in the accompanying drawings, attention being called to the fact, however, that the drawings are illustrative only, and that changes may be made in the specific construction illustrated and described within the scope of the appended claims. 
     The present invention overcomes the shortcomings of the prior art by providing a modulator locator unit that can be inserted into a preformed socket whereby a central monitoring station can determine the location of the wearer of said footwear. Additionally providing for footwear having a locator unit either forming an integral part therewith or exteriorly fastened thereto. 
     The locator unit has means for engaging the side walls of the socket and closure means for securing the unit within said socket. 
     Furthermore, a locator module having a housing, fastener means, positioning determining means and transponder means for transmitting the positioning data can be removably attached to the exterior of the footwear. 
     The foregoing and other objects and advantages will appear from the description to follow. In the description reference is made to the accompanying drawing, which forms a part hereof, and in which is shown by way of illustration specific embodiments in which the invention may be practiced. These embodiments will be described in sufficient detail to enable those skilled in the art to practice the invention, and it is to be understood that other embodiments may be utilized and that structural changes may be made without departing from the scope of the invention. In the accompanying drawing, like reference characters designate the same or similar parts throughout the several views. 
     The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is best defined by the appended claims. 
     List of Reference Numerals Utilized in the Drawings 
     
         
           10  footwear with location determination means 
           12  transponder 
           14  footwear 
           16  mid-sole 
           18  heel 
           20  tongue 
           22  antenna 
           24  GPS 
           26  determination data 
           28  satellite 
           30  wireless 
           32  cell tower 
           34  radio waves 
           36  air waves 
           38  location request transmission 
           40  location response transmission 
           42  central station 
           44  Internet 
           46  electronic equipment 
           48  PDA 
           50  laptop 
           52  computer 
           54  phone 
           56  footwear sole 
           58  mid-sole cavity 
           60  cavity wall 
           62  cavity top surface 
           64  guide track 
           66  clips 
           68  GPS circuit 
           70  Transponder communications 
       
    
    
    
     
       BRIEF DESCRIPTION OF THE DRAWING FIGURES 
       In order that the invention may be more fully understood, it will now be described, by way of example, with reference to the accompanying drawing in which: 
         FIG. 1  is an illustrative view of the present invention in use. 
         FIG. 2  is another illustrative view of the present invention in use. 
         FIG. 3  is another illustrative view of the present invention in use. 
         FIG. 4  is a perspective view of the present invention incorporated into the midsole of a shoe. 
         FIG. 5  is a perspective view of the locator unit removed from the midsole socket of the shoe. 
         FIG. 6  is a bottom view of the locator unit and midsole fastening means for attaching said locator unit. 
         FIG. 7  is a side view of the footwear midsole socket. 
         FIG. 8  is a perspective view of the present invention incorporated into the heel of a shoe. 
         FIG. 9  is a perspective view of the present invention incorporated into the healtongue of a shoe. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     The following discussion describes in detail one embodiment of the invention (and several variations of that embodiment). This discussion should not be construed, however, as limiting the invention to those particular embodiments, practitioners skilled in the art will recognize numerous other embodiments as well. For definition of the complete scope of the invention, the reader is directed to appended claims. 
     Referring to  FIG. 1 , shown is an illustrative view of the present invention in use. Shown is the footwear  14  of the present invention having a locator unit  12  contained therein. The transponder  12  in the preferred embodiment is located within the midsole  16  of the footwear  14  but provides for an alternate location in the heel  18  or tongue  20 . The transponder  12  provides position determination by computational calculating the location using signals  26  transmitted by GPS system  24 . The transponder  12  having means for receiving a location request transmission  38  from a central monitoring station  42  using communications medium  28 ,  30 ,  32 ,  34 , 36  causes said transponder  12  to initiate a location determination sequence by receiving signals  26  from the available plurality of GPS satellites  24  and computationally calculating position determination data that will be subsequently transmitted to the central monitoring station  42  that can forward said data to subscriber communication equipment  46  comprising PDA  48 , laptop  50 , computer  52 , or phone  54  using the Internet  44 . 
     Referring to  FIG. 2 , shown in another illustrative view of the present invention in use. Shown is the footwear  14  of the present invention having a locator unit  12  contained therein. The transponder  12  having received a location request transmission  38  from a central monitoring station  42  using communications medium  28 ,  30 ,  32 ,  34 , 36  and computationally calculating position determination data using signals  26  from the available plurality of GPS satellites  24  transmits the data  40  to the central monitoring station  42  whereupon the central monitoring station  42  can forward said data to subscriber communication equipment  46  which can include PDA  48 , laptop  50 , computer  52 , or phone  54  using the Internet  44 . 
     Referring to  FIG. 3 , shown is another illustrative view of the present invention in use. The footwear transponder  12  having received a location request transmission  38  from a central monitoring station  42  using communications medium  28 ,  30 ,  32 ,  34 , 36  and computationally calculating position determination data using signals  26  from the available plurality of GPS satellites  24  transmits the data  40  to the central monitoring station  42  whereupon the central monitoring station  42  can forward said data to subscriber communication equipment  46  which can include PDA  48 , laptop  50 , computer  52 , or phone  54  using communications medium satellite technology  28 , wireless technology  30 , cellular technology  32 , technology using radio waves  34  and technology using air waves  36 . 
     Referring to  FIG. 4  is a perspective view of the footwear  14  of the present invention having a transponder  12  incorporated into the midsole  16 . The footwear  14  has a socket  58  located in the midsole of the footwear for inserting a modular locator unit  12 . Said modular locator unit  12  having a GPS position determination device for generating location data regarding said locator unit and transponder for wirelessly transmitting the location data  40  to the central monitoring station  42 . The transponder has a receiver for receiving a location request signal  38  from the central monitoring station  42 , whereby the transponder generates a response signal  40  including location information upon receipt of the location request signal  38 . 
     Referring to  FIG. 5 , shown is a perspective view of the location determination module  12  removed from the midsole  16  socket  58  of the shoe  14 . The modular locator unit  12  includes a GPS unit  68  and transponder  70  placed within a mid sole cavity  58  providing means for locating the wearer. The modular unit  12  design consists of a portable self contained GPS  68 , antenna  22  and communications module  70 , that can be housed within a nylon or plastic housing that is molded to fit into the mid sole cavity  58 . The mid-sole cavity  58  having spaced apart walls  60  and top wall  62  has module  12  retaining means  64 . The detachable modular locator unit  14  is equipped with locking clips  66  to prevent it from accidental removal from the footwear  14 . The system can additional be manufactured in a standalone module that can be attached to the shoe by means of hook and loop material or shoelaces. 
     Referring to  FIG. 6 , shown is a bottom view of the footwear  14  of the present invention having the location determination module  12  removed from the midsole  16  socket  58  of the shoe  14 . The modular locator unit  12  includes a GPS unit  68  and transponder  70  placed within a mid sole cavity  58  providing means for locating the wearer. The modular unit  12  design consists of a portable self contained GPS  68 , antenna  22  and communications module  70  that can be housed within a nylon or plastic housing molded to fit into the mid sole cavity  58 . The mid-sole cavity  58  having spaced apart walls  60  and top wall  62  has module  12  retaining means  64 . The detachable modular locator unit  14  is equipped with locking clips  66  to prevent it from accidental removal from the footwear  14 . 
     Referring to  FIG. 7 , shown is a side view of the footwear  14  midsole  16  socket  58 . Shown is the footwear midsole socket  58  having spaced apart sidewalls  60  with means  64  for engaging the modular locator unit  12 . The insertable removable locator unit  12  has means for engaging the side walls  60  of the socket and closure means  66  for securing the locator unit  14  within said socket  58 . 
     Referring to  FIG. 8 , shown is a perspective view of the present invention incorporated into the heel  18  of a shoe  14 . Shown is an additional element of the present invention wherein the footwear  14  has a socket located in the heel  18  of the footwear for inserting a modular locator unit  12 . Said modular locator unit having a GPS position determination device for generating location data regarding said locator unit and transponder for wirelessly transmitting the location data to the central monitoring station and an antenna. The transponder has a receiver for receiving a location request signal from the central monitoring station, whereby the transponder generates a response signal including location information upon receipt of the location request signal. 
     Referring to  FIG. 9 , shown is a perspective view of the present invention having the locator device including a GPS position determination device  68  for generating location data regarding said locator unit and transponder  70  for wirelessly transmitting the location data to the central monitoring station  42  and an antenna  22  contained with a logo exteriorly positioned on the tongue  20  of the shoe. The transponder has a receiver for receiving a location request signal  38  from the central monitoring station  42 , whereby the transponder  70  generates a response signal  40  including location information upon receipt of the location request signal  38 .