Patents Represented by Law Firm McCubbrey, Bartels, Meyer & Ward
  • Patent number: 5119329
    Abstract: An improved memory device based on a non-volatile variable resistance element is disclosed. The resistive element is based on a semiconductor having a resistivity which is determined by the state of polarization of a ferro-electric layer. The semiconductor forms one plate of a parallel plate capacitor having a dielectric comprising the ferro-electric layer. The state of the memory device is determined by measuring the resistivity of the semiconductor layer between two contacts on the semiconductor layer. The state of polarization of the ferro-electric layer is altered by applying a voltage between one of these contacts and the other plate of the capacitor.
    Type: Grant
    Filed: May 13, 1991
    Date of Patent: June 2, 1992
    Assignee: Radiant Technologies
    Inventors: Joseph T. Evans, Jr., Jeff A. Bullington
  • Patent number: 5118221
    Abstract: A deep water platform, suitable for use as a hydrocarbon exploration or production facility in very deep offshore waters, and a method of constructing the same are shown. The platform is positioned on top of a plurality of flexible, buoyant piles made of large diameter, high strength steel tubing. A watertight bulkhead is located within the pile and the portion of the pile below is filled with seawater, while the portion above the bulkhead is substantially empty and in communication with the atmosphere. The bulkhead is positioned to cause the pile to have a predetermined net buoyancy so that the portion below the bulkhead, which is anchored to the seabed, is in tension.
    Type: Grant
    Filed: March 28, 1991
    Date of Patent: June 2, 1992
    Inventor: Robert W. Copple
  • Patent number: 5114655
    Abstract: A method and apparatus are described for forming a closure device having a cylindrical plug and a cylindrical collar extending coextensively and coaxially from a cap. The apparatus includes an outer mold defining an injection mold cavity. A cylindrical hollow outer core extends into the injection mold cavity and a cylindrical inner core extends into the injection mold cavity within the hollow outer core. Pushing means separate the molded part from the inner core. A stripper separates the part from the outer core by engaging an annular shoulder on the part. The part is pushed free of the mold's inner core after the outer mold is removed but before the stripper is advanced to engage the annular shoulder.
    Type: Grant
    Filed: October 16, 1990
    Date of Patent: May 19, 1992
    Assignee: Cole Machine & Mfg. Co.
    Inventor: Harold E. Cole
  • Patent number: 5109156
    Abstract: A light activated AND gate is disclosed which generates a light signal at a first output port in response to the simultaneous presence of light signals at an input port and a control port. With a light signal present at the control port, a light beam at the input port is reflected from an interface between two regions having different indices of refraction, and the reflected light beam then exits through a first output port. In the absence of a light signal at the control port, the two regions of the switching device have the same index of refraction, and the light beam at the input port passes through both regions and exits through a second output port.
    Type: Grant
    Filed: October 25, 1990
    Date of Patent: April 28, 1992
    Assignee: Radiant Technologies, Inc.
    Inventors: Joseph T. Evans, Jeff A. Bullington
  • Patent number: 5107404
    Abstract: A circuit board assembly for a cellular telephone system or the like is described. A housing encloses a printed circuit board. The housing comprises a frame including an outer wall surrounding the periphery of the printed circuit board and a pair of cover plates engaging the outer edges of the outer wall of the frame. The printed circuit board is secured to the frame, and the frame is secured between the cover plates by fasteners which pass through holes in the printed circuit board. A plurality of internal walls on the frame isolate components on the printed circuit board and engage a ground line on the printed circuit board. The printed circuit board is a multi-layer board designed to permit signal lines to pass underneath the ground lines. Components are amounted on both sides of the printed circuit board.
    Type: Grant
    Filed: September 14, 1989
    Date of Patent: April 21, 1992
    Assignee: Astec International Ltd.
    Inventor: Ambrose W. C. Tam
  • Patent number: 5104391
    Abstract: A system and method for detecting breakage in an optical fiber is disclosed. The system includes an acoustic detector coupled to the optical fiber to be monitored for breakage which operates to generate an electrical output signal when the sound of an optical fiber break is detected. A signalling circuit measures the output of the acoustic detector and operates to generate a signal indicative of the output of the acoustic detector, and an indicator circuit is responsive to the output of the signalling circuit to provide an indication of breakage in the optical fiber. In one preferred embodiment, a control circuit is also provided which operates to interrupt light transmission through the optical fiber when breakage of the optical fiber is detected.
    Type: Grant
    Filed: October 30, 1990
    Date of Patent: April 14, 1992
    Assignee: Advanced Cardiovascular Systems
    Inventors: Frank W. Ingle, Michael Aita
  • Patent number: 5101446
    Abstract: A method for coding an image or other two-dimensional data array to provide a sequence of images having differing spatial frequency content is disclosed. The method generates the output images by taking weighted sums of the pixels in the input image. The weights are sets of two-dimensional irreducible scaling and wavelet coefficients.
    Type: Grant
    Filed: May 31, 1990
    Date of Patent: March 31, 1992
    Assignee: Aware, Inc.
    Inventors: Howard L. Resnikoff, David Pollen, David C. P. Linden
  • Patent number: 5097403
    Abstract: A current-sensing rectifier for current rectification and measurement applications is described. The current-sensing rectifier comprises a current-sensing device for rectifying the current in a selected circuit branch and an active-sense comparison circuit to measure the sense current provided by the current-sensing device. The current-sensing device and active measurement circuit are operated such that the current-sensing device rectifies the current of a selected circuit branch. No negative voltage supplies are required for rectification or for the measurement of the branch current. Further embodiments of the present invention include sample-and-hold circuits which sample the value of the rectified current during an ON-period of operation and maintain the sampled value during a subsequent OFF-period.
    Type: Grant
    Filed: February 11, 1991
    Date of Patent: March 17, 1992
    Assignee: Astec International Ltd.
    Inventor: David A. Smith
  • Patent number: 5093600
    Abstract: A piezoelectric relay requiring less piezoelectric material than conventional piezoelectric relays is disclosed. The relay differs from conventional relays in that the contacts are touching with essentially no force applied between the contacts when no power is applied to the relay.
    Type: Grant
    Filed: September 18, 1987
    Date of Patent: March 3, 1992
    Assignee: Pacific Bell
    Inventor: James E. Kohl
  • Patent number: 5093877
    Abstract: An optical fiber lasing apparatus includes an optical fiber which terminates in a lens having a convex lens side at its forward end, and having an extended barrel portion secured to the distal portion of the optical fiber. The lens is larger in diameter than the diameter of the optical fiber member.
    Type: Grant
    Filed: October 30, 1990
    Date of Patent: March 3, 1992
    Assignee: Advanced Cardiovascular Systems
    Inventors: Michael Aita, Robert F. Kotmel, Gene Samson
  • Patent number: 5085526
    Abstract: A programmable temperature detector for simple detection applications is described. The programmable temperature detector has three terminals and a plurality of temperature-transitions points from which to choose. A first terminal receives power from a supply, a second terminal receives a ground reference, and a third terminal provides an indication of an object's temperature crossing a selected temperature-transition point. The desired temperature transition point is specified by a single non-precision resistor coupled in series with the power terminal of the detector. The non-precision resistor and a power supply set a program signal, in the form of a current, into the power terminal of the detector. The programmable temperature detector comprises circuitry for quantizing the program signal into a discrete signal level and for selecting a temperature transition point in response.
    Type: Grant
    Filed: July 26, 1990
    Date of Patent: February 4, 1992
    Assignee: Astec International, Ltd.
    Inventors: Carl K. Sawtell, Marc E. Dagan, Frederic S. Bandy
  • Patent number: 5084667
    Abstract: A variable impedance circuit for use in an external circuit is disclosed. The impedance value is selected by an external circuit. The variable impedance is generated between two terminals which are accessible for connection to external circuitry. The impedance provided between these terminals is determined by a control circuit responsive to electrical signals coupled to the control circuit. An internal register in the control circuit stores a value which specifies the impedance between the two terminals. The stored value is copied into a programmable nonvolatile read-only memory in response to a first predetermined electrical signal. Similarly, the value stored in the read-only memory is selectively copied into the internal control circuit register in response to a second predetermined electrical signal.
    Type: Grant
    Filed: December 22, 1989
    Date of Patent: January 28, 1992
    Assignee: Xicor, Inc.
    Inventors: Joseph Drori, William S. Jennings Check, William H. Owen, III
  • Patent number: 5081703
    Abstract: A mobile communications system uses a communications satellite and a Mobile Telephone Switching Office (MTSO) and communicates with mobile units via the satellite. A cell site has a co-located cell site converter which converts satellite signals to signals for the MTSO and vice-versa. Remote converter sites communicate with the satellite and with the mobile units in given geographical areas. A single satellite link is sufficient for adequate RSA service. Frequency and phase differences among signals from the remote sites to the satellite are synchronized to avoid frequency- and phase-drift.
    Type: Grant
    Filed: June 27, 1990
    Date of Patent: January 14, 1992
    Assignee: Pactel Corporation
    Inventor: William C. Y. Lee
  • Patent number: 5081645
    Abstract: A system comprising apparatuses and methods for encoding and decoding spread spectrum signals is disclosed. Signals are encoded by modulating numerical sequences selected from an orthonormal basis of numerical sequences to provide channel coding. The modulated sequences are then combined to form an encoded signal. Because of the orthonormal character of the sequences, the encoded signal may be easily decoded using a matched filter. A method for generating long sequences from the product of shorter sequences is also disclosed.
    Type: Grant
    Filed: August 6, 1990
    Date of Patent: January 14, 1992
    Assignee: Aware, Inc.
    Inventors: Howard L. Resnikoff, David Pollen, Wayne M. Lawton, Ramesh A. Gopinath
  • Patent number: 5071773
    Abstract: The present invention discloses two hormone receptor-related bioassays. The first bioassay is useful for determining whether a protein suspected of being a hormone receptor has transcription-activating properties of a hormone receptor. The second bioassay is useful for evaluating whether compounds are functional ligands for receptor proteins. According to the first bioassay, cells that contain non-endogenous DNA which expresses a protein suspected of being a hormone receptor and which contain a DNA sequence encoding an operative hormone responsive promoter/enhancer element linked to an operative reporter gene, are cultured, the culturing being conducted in a culture medium containing a known hormone, or an analog thereof. The cultured cells are then monitored for induction of the product of the reporter gene as an indication of functional transcription-activating binding between the hormone or hormone analog and the protein suspected of being a hormone receptor.
    Type: Grant
    Filed: October 20, 1987
    Date of Patent: December 10, 1991
    Assignee: The Salk Institute for Biological Studies
    Inventors: Ronald M. Evans, Cary A. Weinberger, Stanley M. Hollenberg, Vincent Giguere, Jeffrey Arriza, Catherine C. Thompson, Estelita S. Ong
  • Patent number: 5070385
    Abstract: An improved non-volatile variable resistance element is disclosed. The resistive element is based on a semiconductor having a resistivity which is determined by the state of polarization of a ferroelectric layer.
    Type: Grant
    Filed: October 20, 1989
    Date of Patent: December 3, 1991
    Assignee: Radiant Technologies
    Inventors: Joseph T. Evans, Jr., Jeff A. Bullington
  • Patent number: 5068911
    Abstract: An improved image compression system is disclosed in which the image is first repetitively filtered in one direction to produce a series of sub-images. These sub-images are then repetitively filtered in a second image to produce an image representation having a plurality of sub-images in which each sub-image has a different frequency content.
    Type: Grant
    Filed: February 9, 1990
    Date of Patent: November 26, 1991
    Assignee: Aware, Inc.
    Inventors: Howard L. Resnikoff, William Zettler, Jr.
  • Patent number: 5067147
    Abstract: An improved microcell system for cellular telephone systems has a plurality of contiguous cells wherein the cells are configured in a plurality of clusters with each cell in a cluster having a different assigned set of transmission frequencies. Each of the frequencies in an assigned set for a given cell is assignable to a given mobile telephone within the cell for all locations of the mobile telephone within the cell. Frequency handoff circuitry is provided for maintaining continuous communication with mobile telephones moving from cell to cell. Each of the cells is provided with a plurality of antennas each of which is arranged and configured to limit propagation of signals substantially to one of a plurality of regions within the boundaries of the cell, which regions are substantially less in area than the area of the cell.
    Type: Grant
    Filed: April 26, 1991
    Date of Patent: November 19, 1991
    Assignee: PacTel Corporation
    Inventor: William C. Lee
  • Patent number: 5061914
    Abstract: A method of producing an integral piece of thermo-sensitive material, which is responsive to a shift in temperature from below to above a phase transformation temperature range to alter the material's condition to a shape-memory condition and move from one position to another. The method is characterized by depositing a thin film of shape-memory material, such as Nickel titanium (Ni-Ti) onto a substrate by vacuum deposition process such that the alloy exhibits an amorphous non-crystalline structure.
    Type: Grant
    Filed: June 27, 1989
    Date of Patent: October 29, 1991
    Assignee: Tini Alloy Company
    Inventors: John D. Busch, Alfred D. Johnson
  • Patent number: D324021
    Type: Grant
    Filed: July 25, 1990
    Date of Patent: February 18, 1992
    Inventor: John G. Walker