Patents Represented by Attorney, Agent or Law Firm Mark & Clerk
  • Double-talk and path change detection using a matrix of correlation coefficients
    Patent number: 6944288
    Abstract: A process is described which generates matrix coefficients using zero-lag auto and cross-correlations from signals commonly found in echo cancellers. Double-talk and path changes are then detected using matrix operations such as determinants, eigendecompositions, or singular value decompositions (SVDs). In a preferred embodiment, the determinant of the correlation-based matrix is compared against predetermined threshold values.
    Type: Grant
    Filed: January 11, 2002
    Date of Patent: September 13, 2005
    Assignee: Zarlink Semiconductor Inc.
    Inventor: Michael Seibert
  • Method and device for manipulating microscopic quantities of material
    Patent number: 6941033
    Abstract: A method of manipulating a microscopic quantity of material is disclosed wherein an optical fiber probe having a sharp tip with a hole fabricated therein is used to extract the material. The hole is sufficiently small that upon immersion of the sharp tip in the material a virtual seal forms to inhibit penetration of the material into the hole. A laser pulse is sent down the fiber probe to disrupt the seal and promote entry of the material into the hole. The probe can also be used in a reverse manner to deliver trapped material from the hole into a targeted region. The bole also permits an annular light intensity distribution at and near the exit of the probe tip which can be used to optically trap particles.
    Type: Grant
    Filed: June 25, 2003
    Date of Patent: September 6, 2005
    Assignee: National Research Council of Canada
    Inventors: Rod Taylor, Cyril Hnatovsky
  • Blowdown heat recovery
    Patent number: 6938583
    Abstract: A method of recovering heat energy during blowdown of a steam boiler is described wherein thermal energy is recovered both from flash steam produced by blowdown water and the blowdown water itself. The flash steam is preferably condensed in the feedwater (or any open vented water tank) so as to recover the water volume of the flash steam in addition to its heat energy.
    Type: Grant
    Filed: October 29, 2003
    Date of Patent: September 6, 2005
    Inventor: Stewart J. Wood
  • Lean-induced steerable wheel assembly
    Patent number: 6938907
    Abstract: A lean-induced steerable wheel assembly has a pair of parallel wheel hub carriers arranged on either side of a leanable chassis spine. A linkage connects the wheel hub carriers to the chassis spine so that the wheels lean in unison with the chassis spine. A steering mechanism couples the wheel hub carriers to the chassis spine so that an induced lean on the chassis spine steers the wheel hub carriers through a steering angle dependent on the angle of induced lean.
    Type: Grant
    Filed: January 7, 2003
    Date of Patent: September 6, 2005
    Inventor: Norbert Hamy
  • Method of making photonic devices with SOG interlayer
    Patent number: 6937806
    Abstract: A method of making a photonic device having at least two layers formed over a substrate, preferably by plasma enhanced chemical vapor deposition, involves depositing a thin spin-on glass (SOG) interlayer between at least one adjacent pair of layers to improve the roughness characteristics.
    Type: Grant
    Filed: March 21, 2002
    Date of Patent: August 30, 2005
    Assignee: Dalsa Semiconductor Inc.
    Inventor: Luc Ouellet
  • Apparatus for production of striated, laminated lipid-based confections
    Patent number: 6935769
    Abstract: A method of manufacturing multi-layered, laminated, lipid-based sweet confections comprises tempering the lipid-based formulation for each layer, and depositing them separately onto a moving conveyor belt, which is passed through a cooling tunnel between the station where the first layer is placed on the conveyor belt and the station where the next layer is placed. If more than two layers are to be made, additional stations are employed further along the conveyor belt. A set of fingers is located at each station so as to striate the layers as they pass beneath the fingers, so as to govern the width of each ribbon that is thus formed. The width of the fingers in each successive set of fingers is not greater than the width of the fingers in the preceding set.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: August 30, 2005
    Assignee: Cargill Limited
    Inventors: Van Miller, Rene Miller
  • Dynamically configurable human-machine interface
    Patent number: 6938214
    Abstract: A framework is presented to provide support for dynamically configuring a human-machine interface in a network management and service provisioning environment. The framework implements a file parser, methods of accessing a managed object server to interact with instances of managed data network entity objects, a multitude of view panel components and a command interpreter. A multitude of run-time loadable descriptor files are provided to specify the functionality, of view panel instances used by an analyst manipulate information in interacting with the network management and service provisioning environment. The parser is used to load descriptor files and instantiate view panels on demand.
    Type: Grant
    Filed: February 12, 2002
    Date of Patent: August 30, 2005
    Assignee: Alcatel Canada Inc.
    Inventors: Lorraine Proulx, Dominique Trudeau, Sasa Nijemcevic
  • Cellular base station with integrated multipoint radio access and intercell linking
    Patent number: 6904024
    Abstract: A scaleable, broadband wireless system for providing radio access to a metropolitan area. The metropolitan area is sub-divided into overlapping cellular areas each having a base station for communication with network interface units at customer sites within each cell. ATM Radio Interface Cards (ARICs), both time division multiple access (TDMA) and frequency division multiple access (FDMA), in each base station implement protocols for bi-directionally linking the NIUs with the ATM backbone. FDMA ARICs provide point to point radio access between base stations over intercell links. The capacity of the system can be scaled by adding the appropriate ARICs as required to meet demand.
    Type: Grant
    Filed: October 16, 1998
    Date of Patent: June 7, 2005
    Assignee: Alcatel Canada Inc.
    Inventors: Erik H. Boch, Alan Jaakkola
  • Fabrication of microstructures with vacuum-sealed cavity
    Patent number: 6902656
    Abstract: A cavity forming formed in an encapsulation structure under a vacuum in a vacuum chamber is sealed with a capping layer. A stiff protective layer under tensile stress is deposited on the capping layer prior to venting the vacuum chamber to atmospheric pressure. The capping layer is preferably aluminum or an aluminum alloy, and the protective layer is preferably ?-TiN having a suitable high Young's modulus.
    Type: Grant
    Filed: May 24, 2002
    Date of Patent: June 7, 2005
    Assignee: DALSA Semiconductor Inc.
    Inventors: Luc Ouellet, Robert Antaki, Yves Tremblay
  • Signaling switch for use in information protocol telephony
    Patent number: 6898278
    Abstract: A signalling switch for use in information protocol telephony is provided, which can initiate, sustain, and terminate a plurality of discrete voice and data calls simultaneously. A plurality of cards are mounted on a computer bus, where the first card is a single board computer whose function is to act as the operations and maintenance control card for the switch. A non-system card functions as a message transport controller card; and there is at least one further non-system card which functions as a master application controller card. Local bus communication among the non-system cards is provided by a local bus found on the message transport controller card. Telephone routing information protocol software is resident in the switch, and the switch communicates externally via Ethernet interfaces.
    Type: Grant
    Filed: May 8, 2000
    Date of Patent: May 24, 2005
    Inventors: Li Li, Edward Ndububa, Samuel Chen, Jianping Jiang, Jianli Wang, Chunsheng Xie, Tu Do, Frank Xu, Yi Oin, Zoran Milojevic, Anna Cheung, Andre Moskal
  • Fabrication of MEMS devices with spin-on glass
    Patent number: 6896821
    Abstract: A method of making an etched structure in the fabrication of a MEMS device involves depositing a bulk layer, typically of polysilicon, prone to surface roughness. At least one layer of photo-insensitive spin-on planarizing material, such as silicate-based spin-on glass, is formed on the bulk layer to reduce surface roughness. This is patterned with a photoresist layer. A deep etch is then performed through the photoresist layer into the bulk layer. This technique results in much more precise etch structures.
    Type: Grant
    Filed: August 23, 2002
    Date of Patent: May 24, 2005
    Assignee: DALSA Semiconductor Inc.
    Inventor: Luc Louellet
  • Device for forming tight radius curbs and gutters with a paving machine
    Patent number: 6890123
    Abstract: A system and method to allow a paving machine to form tight radii in continuous extrusions such as curbs and gutters is disclosed. A shift cylinder is used with the steering mechanism of a typical paving machine to allow sharp radius turns. The steering cylinder is used to pivot the track of the paving machine about its leg and the steering cylinder is used to pivot the leg relative to the frame of the paving machine. A hydraulic circuit is operator activated to allow fluid flow through a flow divider to ensure each cylinder operates in concert.
    Type: Grant
    Filed: February 6, 2003
    Date of Patent: May 10, 2005
    Assignee: N. Piccoli Construction
    Inventor: Mario Piccoli
  • Method of depositing optical films
    Patent number: 6887514
    Abstract: To deposit optical quality films by PECVD (Plasma Enhanced Chemical Vapor Deposition), a six-dimensional space wherein five dimensions thereof correspond to five respective independent variables of which a set of four independent variables relate to the flow-rate of respective gases, a fifth independent variable relates to total pressure, and a six dimension relates to observed FTIR characteristics is first created. Then an optical film is deposited while maintaining three of the set of four independent variables substantially constant as well as the fifth independent variable, and varying a fourth of the set of four independent variables to obtain desired characteristics in the sixth dimension.
    Type: Grant
    Filed: May 31, 2001
    Date of Patent: May 3, 2005
    Assignee: Dalsa Semiconductor Inc.
    Inventors: Luc Ouellet, Jonathan Lachance, Manuel Grondin, Stephane Blain
  • Conveyor transfer assembly
    Patent number: 6883659
    Abstract: The invention described herein is transfer assembly for transferring articles from an input conveyor to an output position. The transfer assembly includes a support structure and a conveyor assembly mounted to the support structure. The conveyor assembly has a working conveyor surface with an input end and an output end. The output end is moveable in a substantially lateral direction between a first position and a second position. The first position is such that the working conveyor surface is substantially laterally positioned away from the output position while the second position is such that a portion of the working conveyor surface is positioned above the output position.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: April 26, 2005
    Inventor: Ivan Muchalov
  • Capture range control mechanism for voltage controlled oscillators
    Patent number: 6882237
    Abstract: A voltage controlled oscillator generates an output signal whose frequency varies as a first function of a control voltage applied to a control terminal. The voltage controlled oscillator has a wide range of frequency of operation. A gain adjust circuit adjusts the gain of the voltage controlled oscillator such that the first function varies as a second function of the gain. In a preferred embodiment the gain adjust circuit includes a variable impedance that may be external or integrated onto a common chip with the oscillator core.
    Type: Grant
    Filed: April 30, 2003
    Date of Patent: April 19, 2005
    Assignee: Zarlink Semiconductor Inc.
    Inventors: Ranjit Singh, Youcef Fouzar, Simon John Skierszkan, Hazem Abdel-Maguid
  • Modular furniture
    Patent number: 6877824
    Abstract: A system for modular furniture is provided, consisting of a plurality of modules, each having a front wall, a back wall, a left wall, a right wall, a top wall and a bottom wall, the top wall having a recess and the bottom wall having at least one projection corresponding to and operable to fit within and securely engage the recess when a first of the modules is vertically stacked atop of a second of the modules. The modules can be interengagingly and securely stacked either directly atop other modules or staggered atop two or more others to provide a desired configuration. A number of adapters can be used with the modules to provide a number of customized solutions.
    Type: Grant
    Filed: February 21, 2003
    Date of Patent: April 12, 2005
    Inventor: Christine Elizabeth Winkless
  • Handle cutter assembly
    Patent number: 6874237
    Abstract: A handle cutter assembly for making C-shaped handle cuts in cardboard boxed and the like. The cutter assembly has a body having an outer shell defining a blade cavity therein. The body has an upper end and a lower end. A lower aperture is positioned in the lower end. The body also has a blade slider mounted thereto and a grip portion is mounted to its upper end. A cutting blade is mounted within the blade cavity. The cutting blade is slidable by the blade slider between a retracted position substantially within the blade cavity and a cutting position. In the cutting position, the cutting blade extends below the lower end through the lower aperture. The cutting blade has a cutting edge extending away from the body which has a C-shaped cutting profile.
    Type: Grant
    Filed: May 19, 2003
    Date of Patent: April 5, 2005
    Inventor: Lionel L. Robitaille
  • Morphogenetic modelling of in-flight icing
    Patent number: 6868721
    Abstract: The accretion of ice on an aerodynamic surface is predicted by identifying predetermined atmospheric parameters relevant to ice formation in a particular fluid environment. Then the behaviour of individual fluid elements is simulated based on the identified parameters to create a model of the ice accretion.
    Type: Grant
    Filed: June 5, 2003
    Date of Patent: March 22, 2005
    Assignee: National Research Council Canada
    Inventor: Krzysztof Szilder
  • Optical array with improved contact structure
    Patent number: 6867795
    Abstract: A high density array of light emitting diodes for visual display and imaging purposes. The array is mounted on a thermally and electrically conducting medium such as an aluminum block. The block, in one embodiment, is configured to permit a supplementary cooling liquid to be circulated through it. Typically, such LED arrays are fabricated by forming a plurality of p-type islands in n-type host semiconductor material. Each p-type island has an individually addressable contact and a common n-type contact is made to the aluminum block by, for example an electrically conductive epoxy. In operation the connection between the carrier and array may be lost due to a temperature differential between the two components. The present invention avoids this problem by providing a separate connection in parallel with or in place of the common n-type contact.
    Type: Grant
    Filed: July 26, 2000
    Date of Patent: March 15, 2005
    Assignee: Optotek Ltd.
    Inventors: P. Gunnar Wareberg, David I. Kennedy, Richard Woodfield
  • Quantum dot tunable external cavity laser (QD-TEC laser)
    Patent number: 6862312
    Abstract: A laser system includes a laser diode with a low dimensional nanostructure, such as quantum dots or quantum wires, for emitting light over a wide range of wavelengths. An external cavity is used to generate laser light at a wavelength selected by a wavelength-selective element. The system provides a compact and efficient laser tunable over a wide range of wavelengths.
    Type: Grant
    Filed: April 15, 2003
    Date of Patent: March 1, 2005
    Assignee: National Research Council of Canada
    Inventor: Simon Fafard