baber/WOPTO huggingface dataset:
Patent CA-2218951-A1 (CA)
Title: Optical signal power detection with signature bit pattern in wdm systems
Inventor: HARLEY JAMES
IPC: H04B10/077
Filed: 1997-10-22
Abstract: The power of an optical signal (s1) travelling on a channel (.lambda.1) of a WDM transmission system, is measured using a signature bit pattern (s BP1) which is inserted in the frame of the optical signal (s1). The power level of s BP1 is adjusted at the launching point to a predetermined ratio (m) with the power of the optical signal. At a point of interest, the fiber is tapped and a fraction of the tapped signal, that includes a corresponding fraction of s BP1, is converted to an electrical signal. The fraction of s BP1 is extracted from a the electrical signal and power of s BP1 is measured. This gives the optical power of s1 as (m) is known and also the calibration constant for the respective channel (.lambda.1) is known. The method can be applied for any and all channels of the WDM transmission system.
Patent CA-2220250-A1 (CA)
Title: Magnetic location system with adaptive feedback control
Inventor: ACKER DAVID E
IPC: A61B5/06
Filed: 1996-06-03
Abstract: A system for locating objects in space, such as medical instruments (16) within the body of a patient (P), based upon transmission of magnetic fields from coils (10) in a fixed frame of reference to sensors (20, 22, 24) on the object or vice-versa. The current supplied to the coils is adjusted to assure that the sensors receive fields within a preselected range of magnitudes regardless of the location of the object in space. This assures that the sensor operates within its optimum range, and permits use of compact transmitters and sensors.
Patent CA-2220317-A1 (CA)
Inventor: ROOT THOMAS LYMAN
IPC: H04M3/493
Filed: 1997-11-05
Abstract: A unified messaging system that provides a multimedia mailbox. The system allows a subscriber to access stored multimedia messages, such as voicemail messages, facsimile messages, combined voice and facsimile messages and video messages, not only through a public switched telephone network using a telephone but also over a data network, such as the Internet or an intranet, using a personal computer. The system provides voicemail access over the telephone network, indicating message number, etc. with the ability to play messages to the telephone user as desired. For text type messages, such as facsimile and e-mail, the system converts the text into speech and plays the speech to the telephone user. The system allows a personal computer user to obtain the data network access using an Internet browser. The browser is used to access a home page of the system and get information about the messages stored, and is used to download (get) and play the messages at the personal computer via data streaming in the case of a voice or video messages or view the messages in the case of text type messages, such as facsimile and e-mail. The user can also perform the other typical messaging functions over the data network connection that are provided for telephone access, such as viewing a message list, saving and deleting messages, group list administration and other administration tasks.
Patent CA-2220637-A1 (CA)
Inventor: HOFFMANN AMOS
IPC: F01M1/16
Filed: 1997-11-07
Abstract: A passive gravitational drip lubrication system which includes lubrication rate monitoring and control to provide a constant lubrication rate even in the presence of factors that might otherwise change the lubricant drip rate.
Patent CA-2221512-A1 (CA)
Inventor: KERBY MICHAEL CHARLES
IPC: C10G32/02
Filed: 1997-12-03
Abstract: The present invention provides for a method for demetallating petroleum streams, comprising: subjecting a hydrocarbon soluble metals-containing petroleum stream and an aqueous electrolysis medium to a sufficient anodic potential and at a pH sufficient to produce a treated petroleum stream having a decreased metals content.             The invention provides a method for enhancing the value of petroleum feeds that traditionally have limited use in refineries due to their metals, particularly Ni and V content.
Patent CA-2223301-A1 (CA)
Title: Exercise device
Inventor: KONG PHOENIX KUO
IPC: A63B5/11
Filed: 1997-12-02
Abstract: Disclosed herein is an exercise device, comprising a platform; frame means above the platform; handle means secured relative to the platform and movable between a plurality of operable exercise positions; the platform and the handle means allowing a user to operate the handle means while jumping on the platform in an exercise activity.
Patent CA-2224979-A1 (CA)
Inventor: GIALLORENZI THOMAS ROBERT
IPC: H04J13/16
Filed: 1996-06-14
Abstract: A CDMA communication system is provided in which bit rates are dynamically allocated by a single CDMA receiving station (RS) to a plurality of CDMA transmitting stations, (TS1, TS2 ...) all of which are intercoupled to each other over a CDMA channel (FB1) and a feedback channel (FB2). Each CDMA transmitting station (Fig.3) includes a control circuit (31, 32) which sends control signals (Fig. 2A) on the CDMA channel in spaced apart time intervals which request respective bit rates on the CDMA channel; and, the CDMA receiving station (Fig. 4) includes a bit rate allocating circuit (52 53, 54) which receives and responds to the control signals by sending feedback messages (Fig. 2B) over the feedback channel that address individual CDMA  transmitting stations and grant respective bit rates to the addressed station. In one preferred embodiment, each transmitting station includes a data buffer (30) which stores a time varying number of data bytes that are to be sent, and each transmitting station requests respective bit rates on the CDMA channel by including that number in the control signals.
Patent CA-2228033-A1 (CA)
Inventor: MAYER FELIX
IPC: B61G5/10
Filed: 1996-07-15
Abstract: A vehicle, in particular a rail vehicle, has at least two vehicle sections (2, 3, 4) interconnected in an articulated manner and separated by an intermediate space (5, 6) sized to allow for relative displacements of the vehicle sections when driving in a curve, on depressions or bosses. At least one line (14, 15) for electric current, air or hydraulic fluid, arranged for example in the roof area, is associated to the vehicle sections (2, 3, 4) and has a section (16) that compensates for relative displacements of the vehicle sections (2, 3, 4). The intermediate space (5, 6) between the vehicle sections (2, 3, 4) is bridged by a sleeve (11, 12) that envelops the line (14, 15) and is joined thereto in a shear-resistant manner. The section (16) of the line that compensates for relative displacements of the vehicle sections (2, 3, 4) extends horizontally outside the sleeve (11, 12).
Patent CA-2229921-A1 (CA)
Inventor: GRUENBERG ELLIOT L
IPC: H04N7/26
Filed: 1996-08-21
Abstract: Procédé de transmission d'informations numériques par compression. Des branches (123, 103(a),...103(n)) de communication parallèles sont codées pour transmettre des ensembles de bits codés de sorte que ces derniers peuvent être ajoutés (203) les uns aux autres et transmis sur une seule voie de transmission sans interférence. Le décodage s'effectue à la station de réception (6). Conformément à la présente invention, un procédé itératif de modulation de signaux simultanés multiples est appliqué, de sorte que des signaux multiples étroitement espacés peuvent passer à travers un filtre (106) à bande étroite dans lequel la largeur de bande de l'autoroute de communication connectant des stations d'émission et de réception est déterminée par le débit binaire de communication de l'ensemble de bits simultanés. La présente invention peut également être appliquée avantageusement à un système de mise en mémoire numérique par compression.
Patent CA-2231351-A1 (CA)
Title: Skate chassis having a-frame construction
Inventor: WILDER THOMAS V
IPC: A63C17/06
Filed: 1997-07-10
Abstract: A chassis (10) is provided having particular suitability for in-line roller skates. The chassis (10) is formed from unibody aluminum construction and generally comprises longitudinally extending members (20, 22) mounted below forefoot and heel attachment members (12, 14). The longitudinal members (20, 22) generally form an "A-frame" when viewed in axial cross section. The A-frame is characterized by angled upper portions (24) and substantially parallel lower portions (26). The chassis (10) provides improved power transfer efficiency and enhanced structural integrity.
Patent CA-2236038-A1 (CA)
Title: A device in a waste disposal system in a building
Inventor: ERIKSSON BERTIL
IPC: E03B1/04
Filed: 1996-10-29
Abstract: The drain system in a building is divided in at least two parts, namely a first part (2) arranged to receive drain water contaminated to a relatively high degree from one or a plurality of first units (3), and a second part (10) arranged to receive drain water normally contaminated to a lower degree from one or a plurality of second units (11, 12). The second drain system part (10) comprises at least one drain conduit (13) and at least one unit (11) connected thereto and so constructed that it lacks traps preventing a flow of air therethrough. An apparatus (16) is connected to said drain conduit (13), for generating such a negative pressure in said drain conduit giving rise to an evacuating flow of air from the room in question in said building through said at least one unit (11) and through said drain conduit (13).
Patent CA-2238736-A1 (CA)
Inventor: BELARDINELLI LUIZ
IPC: C07D473/06
Filed: 1996-12-26
Abstract: Adenosine and xanthine derivatives, and compositions comprising those compounds, are potent selective agonists and antagonists of adenosine receptors. The derivatives and compositions are used to treat conditions, including certain cardiac arrhythmias.
Patent CA-2248033-A1 (CA)
Title: Method of reducing combustion chamber and intake valve deposits in spark ignition internal combustion engines
Inventor: SISKIN MICHAEL
IPC: C10L1/22
Filed: 1997-03-20
Abstract: Combustion chamber deposits and intake valve deposits in a spark ignition internal combustion engine which uses a liquid hydrocarbon or liquid hydrocarbon-oxygenate fuel, by using an unleaded fuel to which has been added an additive selected from the group consisting of low boiling alkyl pyridines, 4-vinylpyridine, DMF, N-formylpiperidine, sulfolane, polyolefin, polyether or polyether amine derivatives of DMF, amidene, or N-substituted-2 pyrrolidones, polyolefin in an amount of at least about 1,000 wppm and mixtures thereof. Functionalized polymer detergents can be used alone and added to the fuels in amounts in of about at least 3,000 wppm.
Patent CA-2249259-A1 (CA)
Title: Data compression using adaptive bit allocation and hybrid lossless entropy encoding
Inventor: WANG ZHENGRONG
IPC: H04N7/30
Filed: 1997-03-19
Abstract: A method and apparatus for adaptive bit allocation and hybrid lossless entropy encoding. The system includes three components: (1) a transform stage, (2) a quantization stage, and (3) a lossless entropy coder stage. The transform stage (1) uses a wavelet transform algorithm. The quantization stage (2) adaptively estimates values for parameters defining an approximation between quantization size and the logarithm of quantization error, and recursively calculates the optimal quantization size for each band to achieve a desired bit rate. The baseband and subbands are transformed into quantization matrices using the corresponding quantization sizes. The lossless entropy coder stage (3) uses the observation that the entropy property of run lengths of zero index values in the subband quantization matrices is different from the entropy property of non-zero indices. Each quantization matrix is parsed so that each non-zero index is extracted into a separate stream, and the remaining position information is parsed into an odd stream of run length values for "0" and an even stream of run length values for "1". These three streams are Huffman coded separately in conventional fashion.
Patent CA-2249281-A1 (CA)
Inventor: BACON DENNIS RAY
IPC: C11D3/50
Filed: 1997-03-08
Abstract: Automatic dishwashing detergent compositions comprising blooming perfume composition containing blooming perfume ingredients selected from the group consisting of: ingredients having a boiling point of less than about 260 °C and a ClogP of at least about 3, and wherein said perfume composition comprises at least 5 different blooming perfume ingredients, bleaching agent, builder and optionally bleach catalysts. Preferred automatic dishwashing compositions further comprise amylase and/or protease enzymes.
Patent CA-2249902-A1 (CA)
Title: Bone implant
Inventor: CARMICHAEL ROBERT P
IPC: A61C8/00
Filed: 1998-10-09
Abstract: A kit of assemblable components for implantation into the bone of a mammal for use in distraction osteogenesis. The kit comprises a fixture, a footing and a distracter, the fixture including a longitudinally extending body portion with a proximal end and a distal end, the body portion having an exterior surface adapted for contact and integration with bone tissue, the body portion having a generally longitudinally extending bore extending from a proximal opening adjacent the proximal end to a distal opening adjacent the distal end. The footing includes a proximal surface and a distal surface. The distracter comprises a generally rod-shaped body including a distal end and a proximal end, and the proximal end of the distracter is adapted to bear against the footing. There are first and second engaging means on the fixture and the distracter respectively for adjustably locating the fixture relative to the distracter.
Patent CA-2250228-A1 (CA)
Title: Monobore riser bore selector
Inventor: MORGAN MICHAEL GRAHAM
IPC: E21B23/12
Filed: 1997-03-27
Abstract: A bore selection apparatus (38) is described for facilitating access from a single bore riser to a production bore (34, 34a) or annulus bore (36, 36a) without using a wireline-run whipstock. The bore selector apparatus disposed within the bore of a BOP stack (12) and which can be coupled between casing or tubing and a sub-sea test tree. The bore selector apparatus (38) can be actuated from the surface or from an ROV to provide a coupling between the tubing bore (44) and the production bore (34, 34a) or between the tubing bore (44) and the smaller annulus bore (36, 36a). In a preferred embodiment this is achieved by using a rotatable ball valve element (46) located in a housing (42) disposed between the casing/tubing and a sub-sea test tree (39), the ball valve element (46) being apertured and being rotatable between a first position whereby the aperture (48) connects the production tubing to the production tubing bore (34, 34a) and in a second position is rotated whereby the aperture (48) connects the annulus bore (36, 36a) to the tubing or casing bore. When one of the production or annulus bores is connected to the tubing bore, then the other bore is isolated or disconnected. Alternative embodiments of the invention are described.
Patent CA-2253734-A1 (CA)
Inventor: JABLONSKI EDWARD G
IPC: A61K49/22
Filed: 1997-06-05
Abstract: Conventional ultrasonic imaging methods are described which involve the use of aqueous suspension of microspheres. These microspheres are further characterized as consisting of gas cores encapsulated by a protein shell which are formed in the presence of perfluoroalkane vapors. The presence of the vapor during formation changes the shell characteristics and thus protects the gas from being solubilized in the surronding aqueous environment. In addition, the presence of the perfluoroalkane vapor during formation may also provide improved echogenic properties for vascular imaging applications.
Patent CA-2257916-A1 (CA)
Title: Generating replicating molecules in vivo
Inventor: YEH PATRICE
IPC: C12N15/86
Filed: 1997-05-23
Abstract: The invention discloses circular and replicating DNA molecules, useful in gene therapy, as well as a particularly efficient method for generating them in situ from a viral vector.
Patent CA-2258843-A1 (CA)
Title: Biodegradable polymeric mixtures based on thermoplastic starch
Inventor: POMMERANZ WINFRIED
IPC: B32B27/10
Filed: 1997-06-20
Abstract: For converting native starch or starch derivatives into thermoplastic starch, it is proposed that the starch, which is principally responsible for the conversion, be mixed with at least one hydrophobic, biodegradable polymer. This hydrophobic, biodegradable polymer which serves as a plasticising or swelling agent, can be a polymer from the following list: an aliphatic polyester, a copolyester with aliphatic and aromatic blocks, a polyester amide, a polyester urethane, a polyethylene oxide-polymer or a polyglycol and/or mixtures thereof. During the melting process, when mixing the starch, such as native starch in particular or derivatives thereof, with the hydrophobic, biodegradable polymer as a plasticising or swelling agent, to homogenise the mixture, the water content is to be reduced to < 1 wt. % in relation to the weight of the mixture.
Patent CA-2259484-A1 (CA)
Title: Embryonic and adult cns stem cells
Inventor: JOHE KARL K
IPC: A61K35/12
Filed: 1998-05-06
Abstract: A homologous population of CNS multipotent precursor cells from mammalian embryonic neuroepithelial can be expanded in culture while maintaining their multipotential capacity. Chemically defined conditions can generate higher proportions of neurons, astrocytes or oligodendrocytes. In vitro cultures of region-specific, terminally differentiated, mature neurons derived from stem cell cultures are also described.
Patent CA-2260882-A1 (CA)
Title: Call set-up on 800 mhz analog voice channel from 1900 mhz digital control channel
Inventor: BRUNNER RICHARD J
IPC: H04W36/14
Filed: 1997-06-24
Abstract: In a cellular network having a first cluster of base stations (BSA, BSB) serving a first group of mobile stations (MS) over digital RF channels and a second cluster of base stations (BSA, BSB), collocated with said first cluster, for serving a second group of mobile stations over analog RF channels, wherein some of the base stations in the second cluster (A', B') have cells which overlap with cells (A, B) of the first cluster, a method (Figs. 3a, 3b) is disclosed for setting up a call on an analog voice channel of a base station of the second cluster while a mobile station is being served on a digital control channel of a base station in the first cluster. In another a method is disclosed for setting up a call on an analog voice channel while the mobile station is being served on a digital traffic channel.
Patent CA-2261083-A1 (CA)
Inventor: NORTHMORE SCOTT
IPC: G06F3/14
Filed: 1999-02-01
Abstract: A method and system for providing a graphical user interface for application programs implemented with component architectures such as COM (Component Object Model), DOOM (Distributed Component Object Model), CORBA (Common Object Request Broker Architecture) and the like. The invention allows a graphical user interface to be implemented with a renderer such as a DHTML browser and allows new components to be added to an application program without requiring rewriting of the graphical user interface.
Patent CA-2261549-A1 (CA)
Inventor: UCHIDA HIROMICHI
IPC: B43K8/00
Filed: 1999-02-09
Abstract: An adhesive transfer device is provided, which can lead separable paper sheet after adhesive transfer to the outside of its case so that the separable paper sheet is not collected therein, is not consumable but capable of being re-used by renewing tape roll, and permits the user to transfer the adhesive while watching the end of a transfer member from above with its case in a laid-down state.      A tape roll support 6 has a first bevel gear 7, and a second bevel gear 2 meshing with the first bevel gear and having its axes crossing the axes of the first bevel gear, has a teeth number smaller than the first bevel gear, and is formed on one side of a feed roller 8, which is disposed on the extension of separable paper sheet 4 returning, after transfer of adhesive, from the transfer member into the case. The feed roller pinches and pulls separable sheet after the adhesive transfer in cooperation with a pinch roller in contact with its roller surface, thereby leading out the separable paper sheet through an outlet 12, which is provided behind the feed roller and on the extension of the separable paper sheet.
Patent CA-2266355-A1 (CA)
Inventor: ATKINS DAVID SEAGRAVE
IPC: E04H4/16
Filed: 1997-09-29
Abstract: An integrally-moulded foot (3) and disc (2) for a swimming pool cleaner is disclosed. The disc (2) optionally may include tapering holes (17) at spaced intervals.
Patent CA-2267598-A1 (CA)
Inventor: WALKER MICHAEL
IPC: G06F5/16
Filed: 1999-04-08
Abstract: An electronic circuit for providing a basic function in the area of electronic signal processing, particularly in telecommunications, such as a hands-free-talking, noise-suppression, echo-cancellation, or signal-filtering function, and including at least one memory unit for temporarily storing samples is characterized in that in order to simultaneously serve up to N incoming and outgoing communications channels, the memory unit comprises a corresponding number N of parallel-connected cells (25 1, 25 2, ..., 25N), and that the memory unit is preceded at the input end by a multiplexer (21) and followed at the output end by a demultiplexer (22). In this manner, a single-channel circuit is modified with little additional circuitry so that it can provide up to N communications channels with the basic function simultaneously.
Patent CA-2268423-A1 (CA)
Title: Separator for polymer electrolyte fuel cell and process for production thereof
Inventor: HAGIWARA ATSUSHI
IPC: H01M8/02
Filed: 1999-04-09
Abstract: The present invention provides: a separator for polymer electrolyte fuel cell, having, at the surface contacting with the electrode of the fuel cell, a surface roughness of Ra = 0.1 to 10 µm when measured by a surface roughness tester having a probe of 5 µm in front end diameter; and a process for producing the above separator for polymer electrolyte fuel cell, which process comprises immersing a molding of separator for polymer electrolyte fuel cell, in an acidic solution.      The above separator for polymer electrolyte fuel cell alleviates the problems of the prior art and has low contact resistance at the interface with the electrode of the fuel cell.
Patent CA-2268903-A1 (CA)
Inventor: JABLONSKY JULIUS JAMES
IPC: H05K3/00
Filed: 1997-10-21
Abstract: In a developing, etching and stripping apparatus, photoresist developing and stripping chemicals are drawn off into separate circulatory paths in each of which they are pumped through a heat exchanger (52), a series of tangential filters (60, 62, 64, 66), an ultraviolet contactor (56) and a collection tank (38). Permeate from the filters is returned to the developing (14) or stripping (22) stage, and solutions with high concentrations of solids are removed from the collection tanks for disposal. In regeneration of developer solution based on sodium or potassium carbonate, carbon dioxide gas is added along with an alkali metal hydroxide to maintain a suitable pH and carbonate/bicarbonate ratio.
Patent CA-2269151-A1 (CA)
Inventor: WILHELM LEE D
IPC: B31F1/07
Filed: 1999-04-23
Abstract: A novel paper article, a method of making a paper product, and an embossing roll are disclosed for providing a paper surface region having a minority of fiber to fiber bonds broken in the paper surface region to a depth less than about 0.02 mm from the paper surface. In one aspect, the roughened embossing roll includes protuberances or depressions sized at less than about 0.1 mm. In one aspect, the roughened embossing roll includes protuberances or depressions adapted to produce paper product surface deformations in the paper surface, wherein the paper product surface deformations are invisible to an unaided human eye. The present invention provides a paper product having higher perceived softness while maintaining tensile strength.