baber/WOPTO huggingface dataset:
Patent EP-0400979-A2 (EP)
Inventor: FORD WILLIAM ALBERT
IPC: H04M9/08
Filed: 1990-05-30
Abstract: An echo canceler-suppressor speakerphone arrangement effectively addresses the limitations of regeneration and reverberant return echo inherent in the design of speakerphones. The tendency for regeneration is eliminated by employing adaptive echo cancellation in the receive path of the speakerphone arrangement to cancel speakerphone talker echo across a hybrid and thereby reduce the local loop gain to below unity. And the generation of a reverberant return echo to the far-end party is avoided by employing adaptive echo suppression in the transmit path of the speakerphone arrangement. Near-full and full duplex operation are regularly achieved since the receive path remains open at all times and transmit path has its gain reduced only to the level necessary to suppress excessive reverberant return echo.
Patent EP-0419213-A2 (EP)
Inventor: SMITH DONALD P
IPC: A47J37/04
Filed: 1990-09-18
Abstract: A method and apparatus for heating a product (P) which includes a plurality of tapered ducts (90; 290) in a cabinet (20) above and below a conveyor (15; 215) to form streams which are directed toward the product (P). Spent air is drawn through return ducts (81; 89) which have intake openings (83, 87) centered between entrance (24; 224) and exit (26) openings in the cabinet (20) and centered between lateral edges of a conveyor (15; 215) and between the tapered ducts (90; 290) to provide a balanced flow of spent air in the cabinet (20) to the return opening (83, 87). Temperature controlled gas is delivered at an angle through an array of openings (98; 298) adjacent opposite edges of an opening (24, 26; 224) through which a conveyor (15; 215) extends to cause most of the heated air to be drawn to the return duct opening (83, 87) and to maintain internal pressure in the cabinet (20) to prevent ingress and egress of air through the opening (24, 26; 224).
Patent EP-0425299-A2 (EP)
Inventor: NAKASAKI EIJI
IPC: B60C5/01
Filed: 1990-10-26
Abstract: A pneumatic tyre formed from a raw cover tyre characterised by a toroidal tyre main body (2) comprising an injection-formed high polymer material having a pair of bead parts (7) width a bead core (19), two sidewall parts (9) extending outwardly in the radial direction of the tyre from said bead part (7) and a tread bottom part (15) disposed between the outer ends of the two sidewall parts (9), a reinforcement layer (6) comprising at least one ply (6a) comprising a reinforcement cord continuously and spirally wound around the outer surface of said tread bottom part (15) in the circumferential direction; and a tread rubber (5) on the outside of the reinforcement layer (6), wherein the reinforcement layer is in a right circular cylindrical form centred on the tye axis in the state where the tyre main body (2) is inflated with standard internal pressure.
Patent EP-0426429-A2 (EP)
Inventor: KONISHI KAZUO C O INTELL PROPE
IPC: H03M7/42
Filed: 1990-10-30
Abstract: In a variable length code demodulating apparatus, a bit length of the variable length code is examined to determine if it is longer than a specified bit length. The most significant bits equal in number to the specified bit length is selected from variable length codes which have a bit length exceeding the specified bit length. The most significant bits of the variable length code are converted to a conversion code which replaces the most significant lists. The conversion code has a bit length less than the specified bit length. An addressing to a conversion table in which each fixed length code is stored corresponding to each variable length code is performed on the basis of the least significant lists and the conversion code substituting for the most significant lists.
Patent EP-0427470-A2 (EP)
Inventor: ARCHER DONALD H
IPC: H01Q25/00
Filed: 1990-11-02
Abstract: An array antenna system (10) for producing beams with widths constant with scan angle is fed by a microwave lens (12). The beam ports (20₁, ...20₁₁) of the lens (12) are disposed along an arc (16) displaced from the focal arc (22) of the lens (12) The distance ( f) between the displaced arc (16) and the focal arc (22) decreases from a maximum amount at the center of the lens (12) to a minimum amount where the displaced arc (16) intersects the focal arc (22).
Patent EP-0430638-A2 (EP)
Inventor: OYANAGI SHIGERU C O INTELLECTU
IPC: G06F15/18
Filed: 1990-11-27
Abstract: A neural network includes a monitor circuit (13) for monitoring an output value of each neuron and a weighting calculation circuit (14) for calculating a weighting between neurons in accordance with designation from the monitor circuit in order to determine the weightings between the neurons in accordance with an energy function expressed in the form of a sum of a constrain condition and an evaluation function. The monitor circuit (13) monitors the output values of the neurons and transmits, to the weighting calculation circuit (14), information representing an unsatisfactory state in which a distribution of the output values does not satisfy the constrain condition. The weighting calculation circuit (14) changes the weightings between the neurons, e.g., doubles the weightings, every time it receives this information.
Patent EP-0430681-A2 (EP)
Inventor: HINES J R
IPC: G01L9/00
Filed: 1990-11-29
Abstract: A thick diaphragm piezoresistive transducer (100) is capable of operating at around 1000 p.s.i. or above and is formed by placing a thin layer of silicon (120, 120') having a first conductivity type on a major surface of a thick layer of silicon (110, 110') having a second conductivity type. A portion of the thin layer is then electromchemically etched away. Resistors are diffused into another major surface of the thick layer, which is opposite the thin layer.
Patent EP-0446579-A2 (EP)
Inventor: JORDAN PAUL T
IPC: B23B31/173
Filed: 1991-01-18
Abstract: The profiles of the threads on the jaws (30) of a chuck, such as a three-jawed chuck, are modified so that at least one end (38a, 38b) of the jaw thread segments (34) curve in away from the threads on the nut which operate the jaws. This prevents the end edges of the jaw thread segments from digging into the nut threads when the nut is rotated to operate the jaws.
Patent EP-0449175-A2 (EP)
Inventor: PEET NORTON P
IPC: C07D473/08
Filed: 1991-03-25
Abstract: Xanthine derivatives which act selectively at adenosine receptors and which act in general as adenosine antagonists are disclosed. From  in vitro  studies it is known that specific physiological effects can be distinguished as a result of this selectivity and that adenosine receptor activity  in vitro  correlates with adenosine receptor activity  in vivo . 
     Pharmaceutical preparations of the subject compounds can be prepared on the basis of the selective binding activity of the compounds disclosed herein which will enhance certain physiological effects while minimizing others, such as decreasing blood pressure without decreasing heart rate.
Patent EP-0449264-A2 (EP)
Inventor: HIRANO HIROSHIGE
IPC: G05F3/24
Filed: 1991-03-27
Abstract: A pulse signal generator includes a first delay device for delaying an input pulse signal and converting the input signal into a first intermediate signal. A power supply voltage detector detects a power supply voltage and outputs a signal representative thereof. A second delay device serves to delay the first intermediate signal and to convert the first intermediate signal into a second intermediate signal in response to the output signal from the power supply voltage detector. A logic OR operation is executed between the first and second intermediate signals, and an output signal is generated in response to the first and second intermediate signals. The output signal has a pulse width, which is greater than a pulse width of the input signal when the power supply voltage lies in a predetermined range.
Patent EP-0455044-A2 (EP)
IPC: A61G3/00
Filed: 1991-04-17
Abstract: In the ventilation system of the ambulance compartment (4), the air is passed through a filter device (7) which is capable of retaining impurities of small particle size.
Patent EP-0458282-A2 (EP)
Inventor: ICHIYOSHI OSAMU
IPC: H03H17/02
Filed: 1991-05-22
Abstract: In a phase-lock loop device for phase locking a device input signal (11) representing a first complex number and having a device input phase which should be locked into a locked phase, a first complex multiplier (14) calculates a first product of the first complex number and a first conjugate complex number to produce a first complex product signal. The first conjugate complex number is represented by a first conjugate signal which is produced by delaying and processing the device input signal. A second complex multiplier (18) calculates a second product of a phase processed signal and a multiplier input signal to produce a second complex product signal. The phase processed signal is produced by filtering and processing the first complex product signal. The multiplier input signal is produced by delaying and limiting the second complex product signal. A third complex multiplier (22) calculates a third product of the first complex number and a second conjugate complex number to produce a third complex product signal. The second conjugate complex number is represented by a second conjugate signal which is produced by processing the second complex product signal. A fourth complex multiplier (24) calculates a fourth product of the second complex product signal and a filtered signal to produce a fourth complex product signal having the locked phase. The filtered signal is produced by filtering the third complex product signal.
Patent EP-0461476-A2 (EP)
Inventor: MCDERMOTT WAYNE THOMAS
IPC: B24C1/00
Filed: 1991-05-29
Abstract: A method is disclosed for cleaning microelectronic surfaces using an aerosol of at least substantially solid argon particles which impinge upon the surface to be cleaned and then evaporate and the resulting gas is removed by venting along with the contaminants dislodged by the cleaning method.
Patent EP-0468220-A2 (EP)
Inventor: LOTVIN JASON A
IPC: C12P29/00
Filed: 1991-06-27
Abstract: The present invention relates to the cloning, isolation and DNA (isolated fragment from Streptomyces aureofaciens) which directs the synthesis of tetracycline and chlortetracycline, in a heterologous host such as Streptomyces lividans. The claimed plasmids are isolated by screening a cosmid library, constructed in Escherichia coli, for the expression of tetracycline resistance in S. lividans.
Patent EP-0467164-A2 (EP)
Inventor: LOBISCH MICHAEL DR
IPC: A61K31/445
Filed: 1991-07-04
Abstract: The invention relates to the use of the compound flupirtine for the treatment of muscle stiffness disorders.
Patent EP-0479108-A2 (EP)
Inventor: HAWKINS CHRISTOPHER MICHAEL
IPC: C08G63/695
Filed: 1991-09-25
Abstract: Silane esters are transesterified with hydroxyl-terminated polyester resins to obtain end-capped, extended or branched polyester molding compositions.
Patent EP-0471391-A2 (EP)
Inventor: BERRY MICHAEL NATHANIEL PROF
IPC: G01N33/84
Filed: 1988-04-02
Abstract: The invention concerns a process and a composition for the determination of ions in fluids, wherein the influence of these ions on the activity of an enzyme is measured and a binding agent is added for masking of interfering ions. The ions for example are sodium, potassium, calcium, magnesium, manganese, lithium, lead, zinc, copper, iron or other heavy metals or non-metallic ions comprising chloride, bicarbonate, protons, ammonium substances that give rise to ammonium. The enyzmes which are used may be for example a transferase, a hydrolase, an oxidoreductase or a lyase.
Patent EP-0498945-A2 (EP)
Inventor: HALL DOUGLAS WARREN CORNING IN
IPC: G02B6/28
Filed: 1991-11-27
Abstract: The disclosed fiber optic filter structure includes an optical fiber having a single-mode core (31) surrounded by cladding material (32), and at least one light-attenuating light path (33) in the cladding material uniformly spaced from the single-mode core. The propagation constants of the single-mode core and the light path are different at wavelengths except for at least one wavelength λ f . The spacing (S) between the single-mode core and the light path are sufficiently small that light within a first band of wavelengths centered around λ f  couples between the single-mode core and the light path. At least a portion of the light within the first band of wavelengths is absorbed in the light path. In that embodiment in which the single-mode core is a fiber amplifier gain core, the filtering function of the light path modifies the fiber amplifier gain spectrum.
Patent EP-0458374-A2 (EP)
Inventor: DE JONG ROBERTUS EDUARD
IPC: C08L67/02
Filed: 1991-02-21
Abstract: A polymer mixture on the basis of a polyalkylene phthalate ester, a copolyether ester and an agent to improve the impact to which an agent to improve the bonding of lacquer systems on an aqueous base has been added. The polymer mixture according to the invention comprises a polyalkylene glycol polymer or a polyalkylene glycol copolymer as an agent to improve the lacquer bonding.
Patent EP-0438224-A2 (EP)
Inventor: KANNO IPPEI
IPC: H04N7/045
Filed: 1991-01-08
Abstract: Satellite transmission sometimes uses a method of modulating by a sub signal a subcarrier with a frequency set higher than that of a main signal and subjecting the main carrier to frequency modulation by the resulting baseband signal. This method is, however, accompanied by a problem of the occurrence of crosstalk from the main signal to the sub signal. This is attributable to the limited band width of the main carrier on the transmission line, allowing a correction signal equal in magnitude but negative in phase to the crosstalk to be easily prepared on the basis of the transmission line amplitude and group-delay frequency responses and the main signal. The crosstalk may be improved if this correction signal is prepared from the main signal on the transmitting side and added to the sub signal to be transmitted or the correction signal is prepared from the demodulated main signal on the receiving side and added to the demodulated sub signal.
Patent EP-0449559-A2 (EP)
Inventor: KURAKADO MASAHIKO
IPC: H01L39/22
Filed: 1991-03-26
Abstract: In a radiation detection device using superconducting tunnel junctions, the increase in electric capacitance and the decrease in electric resistance due to the increase in junction area for improvement of the detection efficiency are largely repressed by the invention. The junctions are connected in series. The number of the series-connected junctions is settled in the range of larger than 0.05 (SC o /C′) 0.5  and smaller than 20 (SC o /C′) 0.5  or 10SC o /C′, whichever is larger, where S is the total area of the junctions, cm², C o  is the electric capacitance per unit area of the junctions, F/cm², and C′ is the electric capacitance connected to the device in parallel so as to transfer and amplify the signals from the device ,F.
Patent EP-0479554-A2 (EP)
Inventor: HOLLENBERG DAVID HENRY
IPC: D21H17/20
Filed: 1991-10-01
Abstract: A method of creping a fibrous web is described which comprises providing to the interface of a fibrous web and a support surface, preferably a drying surface such as provided by a Yankee dryer, a creping adhesive comprising a non-self-crosslinkable material such as a polymer or oligomer having functional groups which are crosslinkable by ionic crosslinking, and a crosslinking agent which preferably comprises metal cations having a valency of at least three, and removing the fibrous web from the support surface by creping. Also provided is a creping adhesive comprising a polymer, oligomer or mixture thereof having functional groups crosslinkable by cations, a component providing metal cations having a valency of at least three, and an aqueous solvent or diluent for the polymer or oligomer. The glass transition temperature and adhesive strength of the adhesive employed in the invention is readily controllable and the adhesive is easily removed from dryer surfaces.
Patent EP-0458764-A2 (EP)
Inventor: FACCHINI LIBERO
IPC: B07C5/36
Filed: 1991-05-21
Abstract: The device is mounted in a rotary pressing tabletting machine having matrices 5 supported by a rotating table 4, whereinto upper punches 6 and lower punches 7 insert themselves, while tablets 10 come out at an ejection station E, and it comprises a plate 21 fastened to the machine 2 and positioned under the table 4. 
     Part of the border of the plate 21 is located under the station E, while a rotating disk 19 is placed inside a raised border 22 of the plate 21, and has a plurality of hollows 20 whereinto the ejected tablets 10 fall, so that the tablets are drawn by the disk up to be positioned above one or more holes 23,24,25 made in the bottom of the plate 21 and from which holes discharge channels 26 depart. The tablets pass through the holes and are brought away by the channels.
Patent EP-0473556-A2 (EP)
Inventor: BENITO GENTILI
IPC: B60T17/02
Filed: 1991-08-02
Abstract: In a device designed to enhance the accumulation and retention of kinetic energy by the flywheels of engines and motors generally, and to optimize the successive use of such energy, the flywheel (2) turns in an airtight casing (4) connected to a vacuum pump (6) and maintained at negative pressure during operation in such a way that the resistance offered by air to the rotation of the flywheel is minimized.
Patent EP-0498417-A2 (EP)
Inventor: HOHNER GERD DR
IPC: B29C33/62
Filed: 1992-02-06
Abstract: An ester made from an oxidised polyethylene wax and a monofunctional C1- to C8-alkanol has, as a lubricant, a very strong release action in thermoplastic moulding compositions, in particular based on vinyl chloride polymers. In addition, it does not reduce the transparency, in particular in calendered films or sheeting.
Patent EP-0507267-A2 (EP)
Inventor: BASORA SANJUAN ANTONIO
IPC: F24F1/02
Filed: 1992-04-01
Abstract: Air conditioner comprising a first group (1) containing a compressor (2) and a condenser (3), a second group (6) comprising an evaporator (7) as well as circulation ducts (9 and 10) for the refrigerating liquid between the two groups and for the condensation water which is recovered in a tank (11) arranged below the evaporator (1) and sent to a spraying device of the condenser (3). According to the invention, the spraying device comprises a rack (15) which has a longitudinal open duct (16), one end of which is closed by a partition (18) and the other end (19) of which is connected to a tube (20) for injection of water, as well as a pumping means (21), the admission orifice (22) of which is linked to a suction tube (23) for the condensation water and the delivery orifice (24) of which is connected to the tube (20), said duct (16) having its opening (17) applied against the exchange surface (14) of the condenser (3). <IMAGE>
Patent EP-0508335-A2 (EP)
Inventor: VAN DER KUIL HANS
IPC: B03B5/62
Filed: 1992-04-04
Abstract: A device for separating off light materials from mineral raw materials, in particular from sand and gravel, having a sorting region which operates according to the fluidised-bed method, having a charging element for the raw material, a discharge for the cleaned material and an overflow for the light materials, is to be improved with respect to the throughput rate and the separating performance. For this purpose, provision is made for the device to be constructed in two stages having an inner chamber (10) with an associated charging arrangement (11) for charging the raw material and the separating the coarse sand and having an outer chamber (23), which surrounds the inner chamber (10) in an annular fashion and is separated off via an overflow (25), for sorting the fine-grade sand, the outer chamber (23) being constructed as a sorting region which operates according to the fluidised-bed method and the overflow (32) for the light materials adjoining said outer chamber (23). <IMAGE>
Patent EP-0525622-A2 (EP)
Inventor: SHEPHERD JOHN PAUL
IPC: H01S5/02
Filed: 1992-07-22
Abstract: The present invention is directed to a laser diode which is formed of a substrate of a semi-insulating material having a body of a semiconductor material on a surface thereof. The body includes a first layer of one conductivity type on the substrate surface, a laser active layer on the first layer and a second layer of a semiconductor material of the opposite conductivity type on the active layer. Spaced isolation regions of the one conductivity type extend through the second layer and the active layer to the first layer to electrically isolate a portion of the second layer and active layer from the remaining portions of the layers. A first contact region of the opposite conductivity type extends into the isolated portion of the second layer and has a metal contact layer in ohmic contact therewith. A second contact region of the one conductivity type extends through the second layer and active layer to the first layer outside the isolation regions. A metal contact layer is in ohmic contact with the second contact region.
Patent EP-0503862-A2 (EP)
Inventor: JACOBSON BORIS S
IPC: H02M3/335
Filed: 1992-03-06
Abstract: A two-stage, Class E, fixed frequency, resonant, DC-to-DC power converter employing phase-shift control for outstanding performance over a full range from no load to full load has in each stage (14,16) of the DC-to-DC power converter a series inductor-diode network (13,15) in parallel with a feed choke (L1, L2). Such network (13,15) is connected between a power source input (V IN ) and a switching transistor (Q1,Q2), and it provides a fast discharge path for a resonant capacitor (C1,C2) and lossless turn-on of the switching transistor (Q1,Q2) in each power converter stage (14,16).
Patent EP-0509825-A2 (EP)
Inventor: KUROKAWA YASUHIRO
IPC: H01L23/473
Filed: 1992-04-16
Abstract: A packaged semiconductor device comprises a wiring substrate (2), a plurality of semiconductor device chips (1) each having a first surface electrically and mechanically connected to the wiring substrate by use of bumps (3a), and a heat sink (5a) bonded through a high heat conductive bonding layer (4a) to a second surface of each of the semiconductor device chips. The wiring substrate and the heat sink are formed of the same material. 
     In addition, a package casing accommodates the semiconductor device chips and the wiring substrate therein and has internal conductors positioned in the inside of the package casing and external connection pins extending outwardly from the package casing and connected to corresponding internal conductors. The wiring substrate is connected to the internal conductors of the package casing through a flexible wiring circuit member.
Patent EP-0516338-A2 (EP)
Inventor: LEE KUO-HUA
IPC: H01L21/336
Filed: 1992-05-20
Abstract: A gate contact(e.g. 19) to a field effect transistor is opened over the source/drain region(e.g. 21) by forming polysilicon plugs(e.g. 15) between the gate structure(e.g. 5), which has a nitride top layer(e.g. 11), and the field oxide regions(e.g. 3). The contacts(e.g. 19) are formed by oxidizing and etching the gate structure(e.g. 5) and the polysilicon plugs(e.g. 15). An oxide layer(e.g. 31) may be deposited prior to the etching. The latter step opens a gate contact but does not expose the silicon in the plug(e.g. 15) because the different oxidation rates of the polysilicon plug(e.g. 15) and the material(e.g. 11) on top of the gate structure(e.g. 5) create oxide layers having different thicknesses. The nitride is now removed and contacts(e.g. 19) formed to the gate structure(e.g. 5)..