Patents Represented by Attorney F. D. LaRiviere
  • Patent number: 4649233
    Abstract: A method for authenticating nodes/users and in protecting data flow between nodes. This is facilitated by creating a dialogue involving authenticated encryption among the nodes. During each session, a key for use in cryptographic conversion is constructed among the node participants in order to permit symmetric authentication. The key is unique to the session. A different key is generated for each and every session. The building of the session key involves sharing of a minimal amount of information among the participants in the form of combining both a random number and authentication indicia.
    Type: Grant
    Filed: April 11, 1985
    Date of Patent: March 10, 1987
    Assignee: International Business Machines Corporation
    Inventors: Walter E. Bass, Stephen M. Matyas, Jonathan Oseas
  • Patent number: 4609090
    Abstract: Method and apparatus for minimizing the work required for moving, handling, and rolling heavy boxes and the like having a center of gravity. The apparatus incorporates a ramp contoured to the locus of points described by the surfaces of the workpiece as that workpiece rotates about its center of gravity, as that center of gravity is horizontally translated while simultaneously maintained at constant vertical elevation.
    Type: Grant
    Filed: November 18, 1982
    Date of Patent: September 2, 1986
    Inventors: George V. McIlvaine, Thompson A. Baker, Walter U. Uebelacker
  • Patent number: 4578681
    Abstract: An optimized feedhorn comprising a circular waveguide having a corrugated plate disposed around the outside of the aperture of the waveguide wherein the corrugations of the plate are capacitive as to E plane signals. The feedhorn includes a reduced aperture diameter which selectively protrudes beyond the plane of the corrugated plate. The amount of protrusion of the aperture is determined to approximately equalize E and H plane beamwidths and selectively shape the top and skirts of the signal pattern around the center frequency of interest.
    Type: Grant
    Filed: June 21, 1983
    Date of Patent: March 25, 1986
    Assignee: Chaparral Communications, Inc.
    Inventor: H. Taylor Howard
  • Patent number: 4503379
    Abstract: A continuously-variable septum for rotation of electric field polarization in a circular waveguide comprising a continuous, serpentine-shaped, electrically conductive filament.
    Type: Grant
    Filed: April 12, 1983
    Date of Patent: March 5, 1985
    Assignee: Chaparral Communications, Inc.
    Inventor: Clifford Raiman
  • Patent number: 4482834
    Abstract: The acoustic imaging transducer described herein incorporates an acoustic stack contained in an alumina housing which also provides structure for electrically connecting the transducer array elements to system signal processing electronics.
    Type: Grant
    Filed: June 28, 1979
    Date of Patent: November 13, 1984
    Assignee: Hewlett-Packard Company
    Inventors: J. Fleming Dias, H. Edward Karrer, John D. Larson, III, David A. Wilson, Amin M. Hanafy
  • Patent number: 4422110
    Abstract: Data representations are translated on a rotating disc utilizing multiple transducers at different radial positions. The disc is logically formatted into selected concentric bands. Within each band data representations are translated alternately in a repetitive sequence among a selected number of transducers characteristic of the particular band. By appropriately selecting band format parameters and increasing the characteristic number of transducers as a function of decreasing band radial position the track data density may be maintained within selected limits.
    Type: Grant
    Filed: August 25, 1981
    Date of Patent: December 20, 1983
    Assignee: Hewlett-Packard Company
    Inventor: Robert S. Reynolds
  • Patent number: 4268835
    Abstract: A reflector for high gain antennae comprising a plurality of generally triangular shaped petals joined in edgewise overlapping relation, wherein the overlap gradually increases from rim to center of the reflector, so as to provide a mechanically stable paraboloid configuration. The petals are supported by a rigid rim structure constructed of preformed tubular sections.
    Type: Grant
    Filed: February 4, 1980
    Date of Patent: May 19, 1981
    Inventor: Robert B. Taggart
  • Patent number: 4265381
    Abstract: A belt for carrying beverages and liquified food.
    Type: Grant
    Filed: February 26, 1979
    Date of Patent: May 5, 1981
    Inventor: Steven C. Muscatell
  • Patent number: 4261277
    Abstract: A seagoing vessel is stabilized by a passive system including tanks symmetrically disposed on the vessel below the water line. The tanks are connected by a conduit and pressurized with air to a selected pressure level. During each oscillatory roll and/or pitch cycle of the vessel, the tanks alternately fill and drain with selected volumes of water to reduce the righting moment of the vessel. The period of oscillation of the vessel is thus lengthened beyond the period of wave motion.
    Type: Grant
    Filed: April 9, 1979
    Date of Patent: April 14, 1981
    Assignee: Seatek Corporation
    Inventor: Gunnar B. Bergman
  • Patent number: 4203152
    Abstract: The modular read-write and read-only memory, central processing, input-output control keyboard input and output printer units of the calculator described herein provide an adaptable programmable calculator that may be operated manually by the user from the keyboard input unit or automatically by a program stored in memory. Programs may be loaded directly into memory from the keyboard and either data or programs may be separately transferred bi-directionally between the memory unit and an external magnetic card. Programs stored in the memory unit may be edited and key-coded logs, program lists, labels, and messages may be printed by the output printer unit by specifying one of several modes of the calculator. In one of the modes, the printer will print a log comprising a listing of a key code for each key actuated, of nearly all programmable operations performed from the keyboard.
    Type: Grant
    Filed: November 10, 1977
    Date of Patent: May 13, 1980
    Assignee: Hewlett-Packard Company
    Inventors: Robert E. Watson, Jack M. Walden, Charles W. Near
  • Patent number: 4189953
    Abstract: The improved drive system for linearly translating the sample platform of a mensuration stage along two axes comprises two drive bars, each bar having one tapered lontitudinal edge. The X-Y position adjustment of the sample platform is controlled by two manually operable, coaxial controls which are coupled to V-grooved drive wheels. Leaf springs formed in the ends of each drive bar urge the tapered edge of each drive bar into enhanced, frictional engagement with a drive wheel. Each end of the drive bars are also formed to cause the drive bar to frictionally disengage from the drive wheel as the sample platform is driven to its limit in either direction along either axis.
    Type: Grant
    Filed: April 15, 1977
    Date of Patent: February 26, 1980
    Assignee: SemPrex Corporation
    Inventor: Karl G. Volk
  • Patent number: 4186379
    Abstract: A high-speed data transfer system comprising a plurality of data drivers, each with controllably reduced on-resistance and correspondingly reduced risk of driver circuit burnout and each operating asynchronously or synchronously with a plurality of different data drivers.
    Type: Grant
    Filed: April 28, 1977
    Date of Patent: January 29, 1980
    Assignee: Hewlett-Packard Company
    Inventors: Daryl E. Knoblock, Kenneth O. Carey
  • Patent number: 4176614
    Abstract: Control forces for stabilizing semi-submersible platforms are provided outboard the platform columns, at a point approximately where the free surface of the water intersects the columns, without altering the internal arrangements or structure of the platform and employing equipment which develops pressures needed to impose control forces only. In a similar manner, control forces for stabilizing pitch and roll motions in ships and to effectively damp the oscillatory motion of the water level in a "moon pool" are provided.
    Type: Grant
    Filed: March 30, 1978
    Date of Patent: December 4, 1979
    Assignee: SeaTek Corporation
    Inventors: Wilbur H. Goss, Gunnar B. Bergman
  • Patent number: 4162531
    Abstract: The present invention provides programmable, remote and automatic numeric control and calibration of analog signal measuring and generating apparatus. Digital values for control signals for control of gain, sensitivity, frequency and the like and for calibration are stored and may be easily modified to follow complex control and calibration functions. Conventional controls are replaced by pushbuttons which initiate calculation of digital control signals for controlling the transfer function of variable elements of the apparatus. Conventional meters and dials are replaced by digital readout devices for indicating operational parameters such as amplitudes, sensitivities, frequencies and the like. Digital values for calibration factors and parameter control settings also may be recorded on suitable recording media for use under recurring conditions and environments.
    Type: Grant
    Filed: May 22, 1978
    Date of Patent: July 24, 1979
    Assignee: Hewlett-Packard Company
    Inventors: France Rode, Peter Lindes, Ralph F. Eschenbach, Zvonko A. Fazarinc
  • Patent number: 4148557
    Abstract: The retainer sleeve of a ferrule suitable for very small diameter optical fibers is coupled to a connector barrel so that, after the ferrule and optical fiber have been assembled, the position of the optical fiber end with the coupling surface of the ferrule may be adjusted. The connector barrel also includes means for securely locking the adjusted position of the optical fiber in the ferrule.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: April 10, 1979
    Assignee: Hewlett-Packard Company
    Inventor: Steven E. Garvey
  • Patent number: 4141401
    Abstract: A soft carrying case for battery-powered, hand-held calculators and the like, as described herein, prevents the user from turning on the calculator while that calculator is in the carrying case, and provides the user with a way of detecting when the calculator is on if inserted into the carrying case without first being turned off.
    Type: Grant
    Filed: February 28, 1977
    Date of Patent: February 27, 1979
    Inventor: Arno R. Hindemit
  • Patent number: 4129242
    Abstract: The capacitive fluid pressure transducers described herein comprise quartz bodies and diaphragms having suitable electrodes deposited thereon to form both sensing and reference capacitors in appropriate configurations for high fidelity measurement of relative blood pressure, said transducers being substantially unaffected by temperature and other environment factors.
    Type: Grant
    Filed: May 18, 1977
    Date of Patent: December 12, 1978
    Assignee: Hewlett-Packard Company
    Inventors: J. Fleming Dias, Henry E. Karrer, Alexander Tykulsky
  • Patent number: 4114979
    Abstract: The retainer sleeve of a three piece ferrule suitable for very small diameter optical fibers has an outside diameter threaded portion at the closed end so that, after the ferrule and optical fiber have been assembled, an outer sleeve, having a correspondingly threaded inside diameter, can be used to adjust the optical fiber end to be positioned flush with the end face of the ferrule during assembly. The design of the outside threaded sleeve for retaining the connector of two fibers to be connected is improved by inserting a shim sleeve of molded, pliable material having a "D"-shaped inside diameter to apply force to the outside diameter of the ferrules when inserted therein for reliable, concentric snug-fit.
    Type: Grant
    Filed: April 29, 1977
    Date of Patent: September 19, 1978
    Assignee: Hewlett-Packard Company
    Inventor: Earl R. Heldt
  • Patent number: D261242
    Type: Grant
    Filed: May 14, 1979
    Date of Patent: October 13, 1981
    Inventor: Hendrik J. G. Lorist
  • Patent number: D272910
    Type: Grant
    Filed: June 8, 1981
    Date of Patent: March 6, 1984
    Assignee: Chaparral Communications, Inc.
    Inventors: Robert B. Taggart, Howard H. Taylor