Patents Represented by Attorney, Agent or Law Firm Neil Teitelbaum & Associates
  • Patent number: 5848231
    Abstract: A method of configuring and reconfiguring a computer system based on user authorization is presented wherein at least some users perceive themselves and available system resources as the entirety of the computer system. The resources are configured through use of virtual resources providing predetermined access privileges and configurations for some users. In another aspect, a method is provided of configuring and reconfiguring a computer system based on biometric user input wherein at least some user biometric input is necessary in order to gain authorized access to a system and to configure the system based on the authorized user. The configuration is, preferably, transparent to the user.
    Type: Grant
    Filed: December 24, 1996
    Date of Patent: December 8, 1998
    Inventors: Neil Teitelbaum, Gordon Sean Freedman, Stephen J. Borza, Michael A. Borza
  • Patent number: 5839293
    Abstract: An air distribution system for conditioning air and selectably forcing the air into a passenger compartment or a trunk compartment of a vehicle is provided. The air may be pre-cooled or pre-heated before being forced by a ventilator to particular vents. This is particularly useful on a warm day when the top is down on a convertible. By cooling the trunk, specifically, groceries or perishables can be kept relatively cool.
    Type: Grant
    Filed: July 17, 1997
    Date of Patent: November 24, 1998
    Inventors: Neil Teitelbaum, Gordon Freedman
  • Patent number: 5832466
    Abstract: In the design and implementation of neural networks, training is determined by a series of architectural and parametric decisions. A method is disclosed that, using genetic algorithms, improves the training characteristics of a neural network. The method begins with a population and iteratively modifies one or more parameters in each generation based on the network with the best training response in the previous generation.
    Type: Grant
    Filed: August 12, 1996
    Date of Patent: November 3, 1998
    Assignee: International Neural Machines Inc.
    Inventor: Oleg Feldgajer
  • Patent number: 5825950
    Abstract: An optical isolator for passing light in a forward direction with greater intensity than reverse directed light, is provided. The device includes a conventional isolating means having at least two birefringent crystals, and a non-reciprocal rotating element disposed between the two crystals. The isolating means is disposed between two substantially collimating GRIN lenses, and a thermally expanded core (TEC) output optical fiber is coupled to one of the two lenses and an optical fiber having a thermally expanded core optically coupled to the other of the two collimating lenses. Unwanted reflected incident light is poorly coupled into the input TEC optical fiber due the angle of incidence at the fiber end.
    Type: Grant
    Filed: May 13, 1996
    Date of Patent: October 20, 1998
    Assignee: JDS Fitel Inc.
    Inventor: Yihao Cheng
  • Patent number: 5825492
    Abstract: This invention discloses an optical and computation system that enables the magnitude of the retardation, or the birefringence, in a birefringent material to be measured. This is achieved by consideration of the spectral interference pattern generated by combining quadrature axes of polarized light that have passed through the material, however, unlike other approaches, this invention removes the spectral intensity variations of the light source and the spectral attenuation variations of the optical system before analyzing the resultant spectral interference pattern. Since the spectral interference pattern is unique for each retardation or birefringence value, this invention provides an absolute measure of these quantities.
    Type: Grant
    Filed: April 26, 1996
    Date of Patent: October 20, 1998
    Assignee: Jaton Systems Incorporated
    Inventor: Philip L. Mason
  • Patent number: 5822445
    Abstract: A fingerprint identifying device includes a transparent prism having a fingerprint receiving face, a fingerprint viewing face at an acute angle to the fingerprint receiving face, two opposed parallel faces perpendicular to the fingerprint receiving face and a further light-absorbing face generally opposite to the fingerprint viewing face. A light source in the form of a bank of LEDs is provided for transmitting light into the prism. A light diffuser is provided for light transmitted from the light source such that in operation diffused light is transmitted into the prism through both of the parallel faces and against the fingerprint receiving face to provide substantially uniform illumination of a finger contacting the fingerprint receiving face, a fingerprint image being visible through the fingerprint viewing face. Preferably, the bank of LEDs is disposed at the two opposed parallel faces adjacent to the fingerprint receiving face.
    Type: Grant
    Filed: July 8, 1997
    Date of Patent: October 13, 1998
    Assignee: Dew Engineering and Development Limited
    Inventor: John Douglas Evan Wong
  • Patent number: 5818386
    Abstract: A phased array antenna element design and method of using same is disclosed wherein the antenna elements are each provided several signals containing phase, and amplitude information for controlling a beam transmitted or received. The signals are mixed within each antenna element to produce RF signals for transmission or for use as filtering signals for reception. The signals are selected such that some antenna elements receive a same signal and more particularly, such that a single signal is provided to each row of the array and to each column of the array. The row and column signals are combined at elements located at an intersection of the row and column.
    Type: Grant
    Filed: November 22, 1996
    Date of Patent: October 6, 1998
    Assignee: Her Majesty the Queen in right of Canada as represented by Communications Research Centre
    Inventor: Claude Belisle
  • Patent number: 5811939
    Abstract: A circuit and method for switching an output terminal from a first voltage level to a second voltage level through a buffered transition includes two voltage sources, a resistor and first switch connected in series and electrically coupled between the first voltage source and the output terminal for providing a suitable resistance for buffering a transition from a first voltage level to a second voltage level. A second switch is electrically coupled between the first voltage and the output terminal. A third switch is electrically coupled between the second voltage source and the output terminal. A programmable logic controller (PLC) controls the three switches in a predetermined sequence to allow switching a voltage source from the first source to the second source through a buffered transition provided by the resistor.
    Type: Grant
    Filed: December 24, 1996
    Date of Patent: September 22, 1998
    Inventor: Edward Herniak
  • Patent number: 5808763
    Abstract: An optical demultiplexor utilizes a single optical interference filter disposed between an input end and an output end of the device. The filter is preferably housed within a cavity in a glass block having an upstanding input end, endwall. The optical filter is a wavelength selective means having a wavelength characteristic dependent upon an angle of incidence. The device has a plurality of reflective surfaces disposed at the input end for reflecting light reflected from the filter, back to the filter at different predetermined angles. Each different predetermined incident angle allows a different predetermined wavelength of light to pass through the filter to an output end being spatially separated from other predetermined wavelengths that pass through the filter. The reflective surfaces are preferably formed in the upstanding endwall of the glass block. Sixteen channels can be separated by this demultiplexor.
    Type: Grant
    Filed: October 31, 1995
    Date of Patent: September 15, 1998
    Assignee: JDS Fitel Inc.
    Inventors: Gary Stephen Duck, Y. Calvin Si, Neil Teitelbaum
  • Patent number: 5804738
    Abstract: A method and apparatus for testing the stiffness or strength of wood panels while the panels are moving along a production line, in which the panels are moved lengthwise through a tester having lower rollers which are situated to support side or end marginal portions only of the panel while central upper rollers contacts a central region of the panel and subjects the panel to longitudinal or lateral bending. The forces corresponding to the bending are measured and used to obtain a measure of the stiffness or strength of the panel. Preferably, both a longitudinal and a lateral tester are provided, and each have two testing stations each applying a different amount of lateral bending, all of these amounts being in the substantially linear portion of the load deflection curve.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: September 8, 1998
    Assignee: Alberta Research Council
    Inventors: Lars Bach, Jung-June Cheng
  • Patent number: 5798859
    Abstract: A method and device for wavelength locking is provided, wherein an element having a wavelength dependent characteristic such as a Fabry Perot etalon is used to provide an output signal having an intensity that varies with wavelength. The intensity of a reference signal derived from an input signal is compared with an output from the Fabry Perot etalon to provide a feedback signal that corresponds to the frequency of the input signal. The system is calibrated before wavelength locking is performed to determine a ratio of intensities that determines a locked state or condition.
    Type: Grant
    Filed: June 20, 1996
    Date of Patent: August 25, 1998
    Assignee: JDS Fitel Inc.
    Inventors: Paul Colbourne, Joseph Ip, Neil Teitelbaum
  • Patent number: 5798875
    Abstract: An dithering system for implementation of a microscan that dithers an image on an array of sensing elements that defines an image plane by moving one or more lenses which displaces the image focused on the image plane. Piezoelectric positioners are provided to move the one or more lenses a predetermined amount and on a predetermined plane parallel to the image plane so that the image focused by the lensing system on the array of sensing elements is displaced on the image plane by the movement of the lensing system. As the lens is moved by the positioners and thus the optical axis of the lens, the image passing through the lens is also moved on the image plane. Moving the lens horizontally and vertically or in a predetermined pattern provides dithering of the image so that microscanning can be employed.
    Type: Grant
    Filed: November 30, 1995
    Date of Patent: August 25, 1998
    Assignee: Her Majesty the Queen in right of Canada, as represented by the Minister of National Defence
    Inventors: Jean Fortin, Paul Chevrette
  • Patent number: 5799121
    Abstract: An optical device is provided having an input and an output terminal spaced equidistant from an optical axis of a graded index lens. An at least partially reflective surface is disposed spaced but adjacent from another end face of the graded index lens. The optical path length from the input or output terminal to a first end face of the lens is equal to the optical path length from the other end face of the lens to the at least partially reflective surface. The graded index lens has a length that collimates light launched from the input terminal to the at least partially reflective surface. Moving the input an output terminals toward or away from one another changes the angle at which light exits the other end face of the graded index lens, and thus changes the angle at which light is incident upon the at least partially reflecting surface.
    Type: Grant
    Filed: February 14, 1997
    Date of Patent: August 25, 1998
    Assignee: JDS Fitel Inc.
    Inventors: Gary S. Duck, Yihao Cheng
  • Patent number: 5790314
    Abstract: An optical device is disclosed wherein a first GRIN lens and a second GRIN lens having their optical axes offset. The first GRIN lens has one or more input ports at an input end. The second GRIN lens is disposed to receive light from the first GRIN lens. A reflecting surface is coated onto a second end face of the second GRIN lens or alternatively is disposed adjacent to the second end face and positioned to reflect an input beam of light launched into the input end face of the first GRIN lens. The reflective surface is at a location where light incident upon it to be returned to the first GRIN lens is collimated. By placing a filter and third GRIN lens between the first and second lenses double filtering may be achieved at the pass band or pass wavelength of the filter. Furthermore, the more simple arrangement including only first and second lenses provides a means of directing light into and out of the device at different angles or directions with respect to the optical axis of the first lens.
    Type: Grant
    Filed: January 31, 1997
    Date of Patent: August 4, 1998
    Assignee: JDS Fitel Inc.
    Inventors: Gary S. Duck, Yihao Cheng
  • Patent number: 5781318
    Abstract: In optical communications systems crosstalk can result in what is termed silent failure. In silent failure, a faulty transmitter appears to function correctly because a receiver in communication therewith is receiving a signal induced by crosstalk. The invention overcomes this problem by tapping the received signal and monitoring it external to the receiver in order to ensure adequate signal levels for a received signal. A microcontroller disables the failed circuit and in an embodiment switches the communication functions to a stand-by circuit.
    Type: Grant
    Filed: August 2, 1996
    Date of Patent: July 14, 1998
    Assignee: Fitel Photomatrix
    Inventor: Yves Tremblay
  • Patent number: 5778119
    Abstract: A device for coupling out of or into a transmission system which carries light signals is provided. A first optical fiber having a Bragg grating therein has its cladding optically coupled to a second optical fiber having a Bragg grating therein so as to allow at least a predetermined wavelength of light incident upon the first Bragg grating to be forward coupled from the core to the cladding and then to the core region of the second optical waveguide via the second Bragg grating.
    Type: Grant
    Filed: October 8, 1996
    Date of Patent: July 7, 1998
    Assignee: JDS Fitel Inc.
    Inventor: Mark Farries
  • Patent number: 5778089
    Abstract: A fingerprint sensing device and recognition system includes an array of closely spaced apart sensing elements each comprising a sensing electrode and an amplifier circuit. The device is used to sense electrical charge on a fingertip and obviates the need to pre-charge the sensing electrode. The device may be constructed with a single die or with multiple dies.
    Type: Grant
    Filed: March 4, 1996
    Date of Patent: July 7, 1998
    Assignee: Dew Engineering and Development Limited
    Inventor: Michael Andrew Borza
  • Patent number: 5774179
    Abstract: An imaging system for implementation of a microscan includes an array of sensing elements that define an image plane. A movable lensing system is adapted to focus an image on the image plane. Piezoelectric positioners are provided to move the lensing system a predetermined amount and on a predetermined plane parallel to the image plane so that the image focused by the lensing system on the array of sensing elements is displaced on the image plane by the movement of the lensing system. As the lens is moved by the positioners and thus the optical axis of the lens, the image passing through the lens is also moved on the image plane. Moving the lens back and forth or in a predetermined pattern provides dithering of the image so that microscanning can be employed.
    Type: Grant
    Filed: November 30, 1995
    Date of Patent: June 30, 1998
    Assignee: Minister of National Defence
    Inventors: Paul Chevrette, Jean Fortin
  • Patent number: 5768005
    Abstract: This invention relates to a reflective optical isolating device having at least two stages. In one embodiment a polarization independent optical isolating device has an input/output end and a reflector at another end. An isolator is disposed between the reflector and the input/output end. The isolator includes a non-reciprocal rotator in the form of a Faraday rotator, and in one embodiment the isolator also includes two reciprocal rotators. A first end of the isolator includes a birefringent crystal for separating an input beam of light in an input direction and for combing two beams of light in an output direction. The isolator also includes a second birefringent crystal at the other end for combining a separated beam of light on route to the reflector and for separating a combined beam of light in the output direction. In one embodiment two separate single isolation stages are provided, and in another embodiment two stage isolation is provided without providing two single stages of isolation.
    Type: Grant
    Filed: September 28, 1995
    Date of Patent: June 16, 1998
    Assignee: JDS Fitel Inc.
    Inventors: Yihao Cheng, Gary S. Duck
  • Patent number: 5757023
    Abstract: An active semiconductor device that performs in a substantially polarization independent manner. A quantum well waveguide is intermixed by intermixing atoms across an interface between well and barrier layers. The atoms include at least 2 groups wherein intermixing of one group is at a substantially greater rate than another group. Cations are interdiffused at a greater rate than said anions across interfaces between well and barrier layers. The intermixing must be sufficient to provide strain within layers of the waveguide and sufficient to at least partially degenerate light hole and heavy hole bands of the structure. Preferably intermixing is sufficient to completely degenerate light hole and heavy hold bands to essentially produce a device that is completely polarization independent.
    Type: Grant
    Filed: January 23, 1997
    Date of Patent: May 26, 1998
    Assignee: National Research Council of Canada
    Inventors: Emil S. Koteles, Jian Jun He, Sylvain Charbonneau, Philip J. Poole