baber/WOPTO huggingface dataset:
Patent CA-2335331-A1 (CA)
Title: Method and system for authenticating digital optical media
Inventor: SOLLISH BARUCH
IPC: G06F21/80
Filed: 1999-06-15
Abstract: A method for authenticating a digital optical medium to determine if it is original or an unauthorized copy (20). One or more special bistahle data subunits (12) are written onto the original digital optical medium (10) by recording bistable data symbols and other intentional errors into the data subunit such that the data subunit will be on the error-correction limit threshold. A bistable data symbol is a data symbol for which a player will randomly read at least two different values. Depending on which values are read for the bistable data symbols, the bistable data sub-unit will either be error-free and readable (at or below the error-correction limit) or will be erroneous or unreadable (above the error-correction limit). When an unauthorized copy of the digital optical medium is made, the data subunit with the address of the bistable data subunit on the original digital optical medium will be a monostable data subunit with constant data.
Patent CA-2336620-A1 (CA)
Title: Contact assembly for accumulation conveyors
Inventor: COTTER DAVID H
IPC: B65G47/26
Filed: 1999-07-02
Abstract: A contact assembly (50) for an accumulation conveyor (10) includes a support member (60) having a cavity (72) dimensioned to receive a force producing device (74).  A contact member (50) is positioned between the force producing device (74) and the conveying rollers (25) and reciprocates with respect to the conveying rollers (25).  The contact member (50) includes a platform (80) which supports a pair of cantilevered contact rollers (84, 84', 86, 86') journaled at opposing ends of the platform (80).  When the platform (80) is vertically reciprocated by the force-producing device (74), the contact rollers (84, 84', 86, 86') in driving engagement with a drive belt (30) are forced upward, placing the drive belt (30) into driving contact with the conveying rollers (25). The contact member (50) is rotatably connected to the support member (60) while the contact roller (84, 84', 86, 86') positioned first in the direction of travel of the drive belt is formed with a pair of flanges (85). Contact between the drive belt (30) and the flanges (85) rotates the contact member (50) to thereby maintain alignment of the contact rollers (84, 84', 86, 86') and the drive belt (30).
Patent CA-2336763-A1 (CA)
Inventor: USEVITCH BRYAN E
IPC: H04L27/26
Filed: 2001-02-15
Abstract: An orthogonal frequency division multiplexing (FDM) communications system (10) for exchanging radio frequency (RF)(16) signals. The communication system (10) includes a plurality of transmitters (12) adapted to modulate a pair of RF signals using differential phase shift keying (DPSK). A code shift function (18) is adapted to shift the transmitter codes to obtain complete SDPSK orthogonal (CSO) codes in symmetric DPSK (SDPSK) modulated systems, or complete DPSK (CDO) codes in arbitrary DPSK modulated systems. At least one receiver (14) is adapted to receive the modulated signals from the transmitters (12), wherein adjacent channel interference (ACI) of the communications system is minimized and spectral efficiency is increased. The method (100) for SDPSK modulated systems includes the steps of establishing sets of mutually CSO codes (102), establishing relative code shifts and frequency separations for each CSO code (104), and combining the RF  signals into one frequency spectrum (106). The method (110) for arbitrary DPSK modulated systems includes the steps of finding all zero mean sequences (112), Ending a set of CDO codes (114), establishing relative code shifts and frequency separations for each CDO code (116), and combining the RF signals into one frequency spectrum (118).
Patent CA-2341201-A1 (CA)
Inventor: BAUERSACHS WOLFGANG
IPC: B65H37/00
Filed: 1999-08-10
Abstract: A device for transferring a material in the form of a film that is applied to a carrier strip onto a substrate such as a sheet of writing paper or drawing paper. The inventive device comprises a housing that accommodates a supply reel for the film-coated carrier strip and an empty reel that receives the carrier strip when the coating is removed. The film-coated carrier strip is guided via an application foot that is provided with at least one clip-type sliding element which is made of a friction-reducing material in the area around which the carrier strip is twisted and secured to said foot. The aim of the invention is to prove an improved device enabling the film to be transferred onto the substrate as easily as possible. This is achieved by providing the sliding element (15) with an elliptical cross-sectional shape so that when the film is transferred onto the substrate, the sliding element (15) presses against the substrate in a flat area (15) located thereon and the carrier strip is arranged in between.
Patent CA-2343302-A1 (CA)
Title: Dielectric drying kiln electrode connector
Inventor: ENEGREN TERRY ALBERT
IPC: F26B5/04
Filed: 1999-09-10
Abstract: A dielectric drying kiln having a moveable electrode permanently electrically connected with a source of power via an electrical connector formed by a plurality of discrete interconnected electrically and mechanically interconnected conducting element that permit relative movement between the elements. One end of the electrical connector is connected to the moveable electrode and moveable therewith while said electrical connector maintains electrical connection with the source. The electrical connector has a minimum curvature on its outside surface having a radius of at least r to prevent arcing
Patent CA-2347453-A1 (CA)
Title: Oligomerization, polymerization and copolymerization of substituted and unsubstituted .alpha.-methylene-.gamma.-butyrolactones and products thereof
Inventor: GRIDNEV ALEXEI ALEXEYEVICH
IPC: C08F2/00
Filed: 1999-11-30
Abstract: This invention relates to the oligomerization, polymerization and copolymerization of substituted and unsubstituted .alpha.-methylene-.gamma.- butyrolactones and the products thereof. Cobalt (II) and cobalt (III) chain transfer catalysts are used to control the molecular weight and impart an aromatic functionality to the products formed.
Patent CA-2348980-A1 (CA)
Title: Personal watercraft
Inventor: ASELTON RON
IPC: B63B35/73
Filed: 2001-05-28
Abstract: The benefits of a sporty and maneuverable personal watercraft and those of a larger sport boat, having the ability to accommodate a large number of riders, are combined into a single watercraft. The watercraft is equipped with a rear sundeck large enough for passengers to sun bathe while the watercraft is stationary. Disposed beneath the sundeck are storage compartments, each having a lip-less seal for preventing the ingress of water into the compartments. Additionally, the storage compartments are large enough to store a variety of items and accessories such as food, clothes, and first-aid materials. The watercraft is designed such that a relationship between the position of its center of gravity and the position of its center of buoyancy, prevents the watercraft from tipping over even when three of four adults of average size simultaneously board the watercraft from the same side.
Patent CA-2349200-A1 (CA)
Title: Optical transmission apparatuses, methods, and systems
Inventor: PRICE ALISTAIR J
IPC: H04B10/29
Filed: 1999-11-04
Abstract: Apparatuses, methods, and systems are disclosed that provide for simultaneously upconverting electrical signals (lambda sub et lambda sub en) carrying information at electric frequencies onto optical subcarrier lightwave frequencies (nu sub 0) that are greater and less than the carrier frequency of the lightwave onto which the electrical frequencies vere upconverted. The upconversion of the electrical signals can be performed with or without suppression of the optical carrier frequency.
Patent CA-2349530-A1 (CA)
Title: Food selection system and method for animals
Inventor: LEVINE MICHAEL L
IPC: B65D77/24
Filed: 1999-10-29
Abstract: A new scent area (14) is integrated into or attached to a food label (12). The scent area (14) preferably contains the scent and/or taste of the contents within the food container (10). The scent area (14) preferably includes scratch and sniff technology and/or is covered with a peel-off type cover (16) to preserve the freshness of the scent area (140) during shipping and storage.  Animals or infants can then sniff or lick the scent areas (14) from an assortment of food containers (10) and show a preference for a meal selection.  In a further embodiment, a row, column, or array of spaced-apart scent areas (14 a-d) can be presented to a pet or infant, and through sniff and/or taste the pet or infant can indicate the types or flavors of food preferred.  Similarly, food-scented cards, game pieces, or toys (25 a-d and 27 a-d) can be presented to a pet or infant who can select a card game piece, or toy (25 a-d, 27 a-d) to indicate the type and/or flavor of food preferred for the next meal. The pet owner or parent could also use the preference indications to purchase preferred food types and/or flavors. Finally, scent areas (14) can be added to the labels of wines or sauces to provide an adult purchaser with olfactory information about the contents of an olfactory-inhibiting container.
Patent CA-2349637-A1 (CA)
Title: Process for preparing acylphosphines and derivatives
Inventor: KAESER RENE
IPC: C07F9/50
Filed: 1999-11-20
Abstract: A description is given of processes for the preparation of mono- and bisacylphosphines and of mono- and bisacylphosphine oxides and mono- and bisacylphosphine sulfides, which comprises first reacting organic P- monohalogenophosphines or P,P-dihalogenophosphines, or mixtures thereof, wit h an alkali metal or magnesium in combination with lithium, where appropriate in the presence of a catalyst, and then carrying out the reaction with acid halides and, in the case of the process for the preparation of oxides, carrying out an oxidation step and, in the case of the preparation of sulfides, reacting the phosphines so obtained with sulfur. It is characteristic, inter alia, that the processes are carried out without isolation of the intermediates.
Patent CA-2351139-A1 (CA)
Inventor: MAYER JUDY A
IPC: A41D27/10
Filed: 2001-06-21
Abstract: A shirt (10) or upper cover comprises a torso enclosure (14) and sleeves (16; 18). The sleeves (16, 18) have short top lengths (TL) and long bottom lengths (BL). The sleeve seams (20, 22) extend over the clavicle/acromin regions of the wearer (12) of the shirt (10). Top regions (30, 32) of the torso enclosure (14) and the tops (34, 36) of the sleeves (16, 18) follow the curvature of the shoulder substantially above the shoulder joints. The bottoms of the sleeves fold upwardly into the armpits of the wearer (12), providing perspiration absorbing cloth against skin regions of the torso and the arms.
Patent CA-2352186-A1 (CA)
Inventor: SCHLESIGER HARTWIG
IPC: C08B11/20
Filed: 1999-11-15
Abstract: Disclosed is a method for producing low-viscuous water-soluble cellulose ethers by oxidative degradation of higher viscuous cellulose ethers with hydrogen peroxide. The higher viscuous cellulose ether is intensely mixed with an aqueous solution of hydrogen peroxide at temperatures of 65-125 °C. The mixing ratio is chosen in such a way that the quantity of hydrogen peroxide is 0.1-10 wt. % in relation to the dry cellulose ether, that the solids content of the mixture is not lower than 25 wt. % in relation to the whole quantity of the mixture and that the mixture is then kept in motion at temperatures of 65-125 °C  until at least approximately 90 % of the hydrogen peroxide is used.
Patent CA-2354807-A1 (CA)
Inventor: WATERMAN TIMOTHY J
IPC: H02K9/04
Filed: 2001-08-07
Abstract: A prop fan blade assembly for a draft inducer motor cooling fan used in a high efficiency furnace includes rings concentric with and attached to an outer blade guard. Cooling air is drawn through the concentric rings by the fan and blown onto the motor. The rings function as a finger guard while producing a confined airflow pattern which does not interfere with burner operation.
Patent CA-2357164-A1 (CA)
Inventor: LAWAL ROBERT A
IPC: A63F3/04
Filed: 2001-09-10
Abstract: A word game and method of playing the word game. The word game has a plurality of letter indicator members, each having a letter indicia corresponding to a selected letter or choice of letter, each letter indicia being assigned a predetermined point value for use in calculating an initial score value of a word formed from a random selection of the letter indicia. The game further includes a plurality of score manipulation members, each having a scoring indicia for manipulating the initial score value and determining a final score of the word. The score manipulation members are arrangeable in a random order from one game to the next.
Patent CA-2358026-A1 (CA)
Title: Latent heat storage device
Inventor: GASPER CHARLES G
IPC: F28D20/02
Filed: 2001-10-02
Abstract: A low volume, high capacity latent heat storage device is achieved in a construction including a salt case (12) with an optional outer jacket (10) surrounding the salt case (12) in spaced relation thereto to define an insulating space (14) between the two. Inlet and outlet conduits (38), (42), (44), (46), extend from the exterior of the outer jacket (10) to the interior of the salt case (12) and at least one tube (20) is located within the salt case and has a plurality of straight, parallel runs (21) defining a matrix with an exterior and a phase change material is sealed within the tube (20). The tube runs (21) inwardly of the matrix exterior are in a regular or equilateral polygonal pattern with each run (21) abutting a plurality of adjacent runs (21) and each run (21) at the exterior of the matrix additionally engaging the salt jacket (12). The runs (21) have cross-sectional shapes such that flow spaces ( 102, ( 104) exist between the runs (21) and between the salt jacket (12) as well between adjacent runs (21). The flow spaces (102), (104) are in fluid communication with the inlet and outlet conduits (38), (42), (44), (46).
Patent CA-2359927-A1 (CA)
Title: Process and apparatus for manufacturing endodontic instruments
Inventor: MUNCHEL SCOTT A
IPC: B23G1/36
Filed: 2000-01-25
Abstract: An improved process for producing an endodontic instrument (38) with a predetermined taper (80) having a plurality of flutes (94, 95, 96), each with a predetermined number of spirals over a predetermined length of the instrument are provided. The process basically comprises providing a grinding wheel (20) rotated about a first axis having a plurality of flute grinding ribs (40, 42, 44) and a rolled deformed metal grinding rib (46) extending from a periphery thereof. A rotating wire stock (12) is fed past the plurality of grinding ribs (40, 42, 44) and the rolled deformed metal grinding rib (46) at a controlled rate along a second axis so that a separate flute (94, 95, 96) is ground on the wire stock (12) by each of the flute grinding ribs (40, 42, 44) and rolled deformed metal is removed from the ground wire stock (12) by the rolled deformed metal grinding rib (46). Simultaneously with feeding the rotating wire stock (12), the grinding wheel (20) or the wire stock (12) is translated such that a distance between the first andsecond axes increases as the bar stock is fed whereby the wire stock is tapered (80) as the flutes are ground thereon.
Patent CA-2360342-A1 (CA)
Title: Generation of single-strand circular dna from linear self-annealing segments
Inventor: ABARZUA PATRICIO
IPC: C12Q1/6806
Filed: 2000-11-28
Abstract: The present invention provides a method for the rapid simultaneous production of a plurality of single-stranded DNA circles having a predetermined size and nucleotide sequence using pre-designed hairpin oligonucleotides containing complementary sequences for directing ligation to form dumbbell-shaped monomers followed by heat denaturation to yield single-stranded DNA circles.
Patent CA-2360800-A1 (CA)
Title: Inhibition of the mhc class ii antigen presentation pathway and presentation to cd4+ cells
Inventor: JOHNSON DAVID C
IPC: A61K38/095
Filed: 2000-02-02
Abstract: The human cytomegalovirus (HCMV) protein, that was previously shown to block the MHC class I antigen presentation pathway, has been shown herein to block the MHC class II pathway. This is surprising because the class I and class II  proteins are not homologous. US2 caused degradation of class II-alpha proteins and also class II-DM-alpha, part of an enzymatic complex required for loading of antigenic peptides. In this way, US2 has a double inhibitory effect on the MHC class II pathway. US2 expression in cells effectively blocked presentation of antigens to CD4+ T lymphocytes. US2, or soluble variants thereof, can be used to reduce inappropriate immune responses directed to vectors, or expressed transgenes. In addition, such molecules can be used to block immunity to transplanted cells or organs or in autoimmune diseases.
Patent CA-2361156-A1 (CA)
Title: Production method of 2-cyclohexyl-2-hydroxy-2-phenylacetic acid, intermediate therefor and production method thereof
Inventor: GAO WEI-GUO
IPC: C07C67/303
Filed: 2001-11-06
Abstract: The present invention relates to production of 2-cyclohexyl-2-hydroxy-2-phenylacetic acid useful as an intermediate for pharmaceutical products, by an industrial means, economically, safely in a good yield. Novel 2-(2'-cyclohexen-1'-yl)-2-hydroxy-2-phenylacetic acid ester obtained by reacting cyclohexene and benzoylformic acid ester in the presence of a Lewis acid is hydrolyzed and reduced to give 2-cyclohexyl-2-hydroxy-2-phenylacetic acid.
Patent CA-2362265-A1 (CA)
Inventor: ISAK TORBEN
IPC: A23L27/60
Filed: 2000-03-16
Abstract: There is provided an anti-oxidant composition comprising a cyclic compound having formula (I) or a derivative thereof, wherein R1 and R2 are independently selected from -OH, =O, wherein R3 is a substituent comprising an -OH group; and wherein R4 and R5 are other than H; with the proviso that the  compound is other than ascorbic acid.
Patent CA-2362631-A1 (CA)
Title: Debitmetre pourvu d'une fonction de diagnostic
Inventor: KAVAKLIOGLU KADIR
IPC: G01F1/50
Filed: 2000-02-24
Abstract: Un débitmètre (82) permet de diagnostiquer l'état de son élément primaire (28) ou des lignes de transmission d'impulsions (30) reliées à un capteur de pression différentielle (31). Un circuit différentiel (90) couplé à un capteur de pression différentielle (31) présente une sortie différentielle représentant la pression différentielle détectée moins une moyenne mobile. Un circuit de calcul (92) reçoit la valeur de sortie différentielle et calcule une valeur de sortie de données historiques simulée pendant un temps de simulation initial. Le circuit de calcul (92) calcule également une valeur de sortie de contrôle des données actuelles obtenues pendant l'opération de contrôle ou pendant le fonctionnement normal du débitmètre (82). Un circuit de diagnostic reçoit la valeur de sortie simulée et la valeur de sortie de contrôle et génère une valeur de sortie de diagnostic indiquant l'état en cours de l'élément primaire (28) et des lignes de transmission d'impulsions (30).
Patent CA-2363927-A1 (CA)
Title: Synchronization signal detector and method
Inventor: KEMENCZY ZOLTAN
IPC: H04L7/04
Filed: 2001-11-27
Abstract: A synchronization (sync) signal detector and associated method detect the occurrence of a known sync signal in a received signal. The known sync signal is generated and correlated with the received signal to generate a correlation waveform.   A peak value of the correlation waveform, indicative of the occurrence of the sync signal in the received signal, is detected and used to determine a timing offset between the received signal and the sync signal. The sync signal is then shifted in time to compensate for the timing offset. Such shifting of the sync signal is simpler and requires substantially less processing time and resources compared to known sync signal detection schemes, in which a received signal or the sampling timing of a received signal is shifted to compensate for timing offset.
Patent CA-2366647-A1 (CA)
Title: Cutting tool device for wood planing machine
Inventor: HU TENG-FU
IPC: B27G13/04
Filed: 2002-01-04
Abstract: A cutting tool device for a wood planing machine includes a driving shaft having a cylindrical portion and a plurality of insert receiving channels. Each of the channels includes a knife seat wall surface and an abutment wall surface, which confine an accommodating cavity therebetween. The knife seat wall surface has left and right end edges respectively having left and right secant points at a respective junction with an outer wall surface of the cylindrical portion. The left secant point lags behind the right secant point in a counterclockwise operating direction. A planing knife is disposed to abut against the knife seat wall surface.      A tightening insert member is inserted into the accommodating cavity, and has front and rear wall surfaces respectively abutting against the planing knife and the abutment wall surface to thereby clamp the planing knife firmly in the respective channel.
Patent CA-2368915-A1 (CA)
Inventor: SONNIER JAMES A
IPC: E21B47/18
Filed: 2002-01-22
Abstract: The present invention discloses the concept of using, for the purpose of operating a well control tool such as setting a packer, slip or whipstock, wireless data signal emissions from a downhole telemetry instrument such as an MWD or LWD unit that is energized by pumped fluid flow along a surface connected tubing string. The well control tool may be one that derives operating energy in situ such as from well bore fluid pressure or batteries. Operation of the well control tool is triggered by a battery powered microprocessor that is programmed to respond to a predetermined sequence of wireless data signal emissions from the telemetry instrument. Control over the wireless data signal sequence is exercised by control over the pumped flow stream such as by starting and stopping the pump or diverting the downhole flow stream.
Patent CA-2369548-A1 (CA)
Inventor: MCGLINCHY TIMOTHY BRYAN
IPC: E06B3/673
Filed: 2002-01-25
Abstract: An apparatus for making notched muntin bars. The apparatus includes an uncoiler or support for a supply of ribbon stock, a notching device, a roll forming machine and a severing device. The ribbon stock has a surface with first and second finishes. The notching device receives ribbon stock from the supply of ribbon stock. The notching device includes a punch that is moveable from a first position to a second position. In the first position the punch is activated to remove sections of material having the first finish. In the second position the punch is activated to remove sections of material having the second finish. The roll forming machine receives the ribbon stock from the notching device to form hollow muntin bar stock that has a first side with the first finish and a second side with the second finish. The formed muntin bar stock has notches in the first side having the first finish and notches in the second side having the second finish. The severing device severs the muntin bar stock to form individual muntin bars having the first and second finishes. The individual muntin bars may be assembled into a muntin bar grid having a first side with the first finish and second side with the second finish.