David M Griffith

US Patent:

6633935, Oct 14, 2003

Filed:

Sep 27, 2000

Appl. No.:

09/671939

Inventors:

Wing Chan - Pleasanton CA
David L. Griffith - Pleasanton CA

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

G06F 1300

US Classification:

710100

Abstract:

An on line serviceable computing system employing a small computer system interface (SCSI) bus architecture connecting two host computers to at least one additional shared device including a termination adapter circuit that can sense when a SCSI termination at the end of the SCSI bus is lost and automatically switch in a new SCSI bus termination to thereby ensure that the bus is terminated at both ends as required for continuous operation.

US Patent:

7457175, Nov 25, 2008

Filed:

Oct 23, 2006

Appl. No.:

11/552107

Inventors:

David L. Griffith - Fremont CA, US
Michel P. Cekleov - Mountain View CA, US

Assignee:

3Par, Inc. - Fremont CA

International Classification:

G11C 7/00

US Classification:

365193, 3652331

Abstract:

A memory controller includes a gate circuit gating a data strobe signal from a memory device, a delay circuit delaying the data strobe signal from the gate circuit, a read buffer capturing values of a data signal from the memory device in response to the data strobe signal, a cumulative strobe counter incrementing a detected strobe count by the number of edges detected in the data strobe signal, and a control logic controlling the gate circuit and receiving the detected strobe count from the strobe counter. The control logic enables and disables the gate circuit after the start of a preamble and before the end of a postamble in the data strobe signal, respectively. When the memory controller is not expecting the data strobe signal from the memory device, the control logic compares the detected and the expected strobe counts and reports a strobe error when they do not match.

US Patent:

50299670, Jul 9, 1991

Filed:

Apr 9, 1990

Appl. No.:

7/506424

Inventors:

Darrell L. Livezey - Bellevue WA
David M. Griffith - Renton WA
Raymond W. Huggins - Mercer Island WA

Assignee:

The Boeing Company - Seattle WA

International Classification:

G02B 634

US Classification:

350 9619

Abstract:

An optical source for use in an optical sensing system such as a wavelength division multiplexing system. The source produces an optical interrogation signal comprising a plurality of component signals, each component signal comprising light in a wavelength band different from the wavelength bands of the other component signals. The source comprises a concave diffraction grating, means for forming an aperture at which the interrogation signal will be formed, and a plurality of optical emitters. Each emitter is positioned such that the emitter output signal strikes the concave diffraction grating, and is focused onto the aperture, such that a portion of the emitter signal enters the aperture and forms one of the component signals. As a result, the component signal wavelengths are not sensitive to temperature-induced fluctuations in the emitter output signal.

US Patent:

61924334, Feb 20, 2001

Filed:

Jul 14, 1998

Appl. No.:

9/115144

Inventors:

Wing Chan - Pleasanton CA
David L. Griffith - Pleasanton CA

Assignee:

Tandem Computers Incorporated - Cupertino CA

International Classification:

G06F 1300

US Classification:

710101

Abstract:

An on line serviceable computing system employing a small computer system interface (SCSI) bus architecture connecting two host computers to at least one additional shared device including a termination adapter circuit that can sense when a SCSI termination at the end of the SCSI bus is lost and automatically switch in a new SCSI bus termination to thereby ensure that the bus is terminated at both ends as required for continuous operation.

US Patent:

40866599, Apr 25, 1978

Filed:

Feb 28, 1977

Appl. No.:

5/773102

Inventors:

Stipe Cizmic - San Mateo CA
Wayne L. Edwards - Mountain View CA
David L. Griffith - Pleasanton CA
Martin O. Halfhill - San Jose CA
James O. Jacques - Tracy CA
Leonard R. Shenfield - Santa Clara CA
Ronald W. Votaw - Morgan CA

Assignee:

Xerox Corporation - Stamford CT

International Classification:

G11B 1700
G06F 1308

US Classification:

364900

Abstract:

A disk drive comprises a housing having a door through which a cartridge including a recording disk therein may be inserted. A spindle drive assembly is mounted in the housing and is responsive to a first set of instructions for rotating the recording disk of a disk cartridge loaded into the housing through the door and onto the spindle drive assembly. An actuator is also mounted in the housing and is capable of controlled reciprocal movements relative to the axis of rotation of the spindle drive assembly. A head carriage assembly is mounted in the housing to the actuator and includes at least one electromagnetic read/write head thereon for reading data from the writing data onto tracks of the recording disk of a cartridge loaded onto the spindle drive assembly. Servo control apparatus is mounted in the housing and is responsive to a second set of instructions for controlling the speed and direction of the reciprocal movements of the actuator. Additionally, read/write apparatus is mounted in the housing and is responsive to a third set of instructions for controlling the reading and writing of data by the electromagnetic head.

US Patent:

54933935, Feb 20, 1996

Filed:

Oct 12, 1993

Appl. No.:

8/075597

Inventors:

Mark W. Beranek - Bellevue WA
Barbara A. Capron - Issaquah WA
Raymond W. Huggins - Mercer Island WA
David M. Griffith - Renton WA
Darrell L. Livezy - Renton WA
Timothy Traynor - Redmond WA

Assignee:

The Boeing Company - Seattle WA

International Classification:

G01J 320
G01J 336

US Classification:

356328

Abstract:

A spectrograph usable as a demultiplexer/detector in a wavelength division multiplexing optical system. The spectrograph comprises a planar waveguide and a detector array. The planar waveguide has a dispersive edge having an inwardly concave shape, an input edge, and a straight output edge. The dispersive edge has a reflective diffraction grating formed on it, the grating having a variable line spacing. An optical input signal comprising a plurality of different wavelength ranges enters the waveguide at the input edge, and travels through the waveguide and strikes the grating. The grating focuses the optical energy in each of the wavelength ranges at a focal spot at the output edge, the position of each focal spot being a function of wavelength. The detector array comprises a plurality of photodetectors positioned along a straight line, such that the photodetectors are positioned at the focal spots. Each photodetector therefore detects the optical energy in one of the input ranges.

US Patent:

20200222611, Jul 16, 2020

Filed:

Mar 16, 2020

Appl. No.:

16/820153

Inventors:

- Waltham MA, US
Martin Joseph Crnkovich - Walnut Creek CA, US
Bert D. Egley - Walnut Creek CA, US
David Charles Griffith - Pittsburg CA, US
Roland Levin - San Ramon CA, US
Houssein Nasseri - Elk Grove CA, US
Kulwinder S. Plahey - Martinez CA, US
David Yuds - Hudson NH, US

International Classification:

A61M 1/16
A61M 1/28
H02S 10/10
H02S 40/38
B01D 5/00
H02J 7/35

Abstract:

A dialysis system (e.g., a hemodialysis (HD) system) can be designed to operate in alternative environments, such as disaster relief settings or underdeveloped regions. The dialysis system can include a solar panel for generating electricity to power the dialysis machine and an atmospheric water generator for extracting water from ambient air. The extracted water can be used to generate dialysate and saline on-site. One or more of the components of the dialysis machine can be discrete components that are configured to facilitate fast shipping and simple on-site assembly (e.g., at a remote location). In some implementations, the discrete components may be configured to be attached to an existing dialysis system (e.g., a dialysis system designed for operation in a traditional environment) to permit the dialysis system to operate in an alternative environment.

US Patent:

20150211668, Jul 30, 2015

Filed:

Jan 29, 2014

Appl. No.:

14/167139

Inventors:

- Chicago IL, US
David M. Griffith - Bellevue WA, US
Ronald L. Clements - Kent WA, US
Alexandra N. Sonnabend - Seattle WA, US
Tammy L. McLeod - Renton WA, US

Assignee:

The Boeing Company - Chicago IL

International Classification:

F16L 37/084
F16L 37/091

Abstract:

A tube fitting including a first fitting member having a cylindrical body including a flange, a second fitting member having a cylindrical body including a plurality of tines extending from the cylindrical body, the plurality of tines being configured to engage the flange where the plurality of tines and the flange are configured to secure the first and second fitting members to each other, and at least one seal disposed between the first fitting member and the second fitting member.