Donald J Walker

US Patent:

6666375, Dec 23, 2003

Filed:

Apr 5, 2000

Appl. No.:

09/543600

Inventors:

Douglas L. Harriman - Portland OR
David F. D. Buck - Ridgefield WA
Donald G. Walker - Vancouver WA

Assignee:

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

International Classification:

G06K 714

US Classification:

235454, 235375

Abstract:

A unitary, rotary encoder disk provides low cost, ease of manufacture, and resolution capability exceeding through hole encoders and, in one embodiment, equivalent to that achieve in thin film technologies. The unitary construct is molded as a transparent polymer disk, with integrated mounting features. Either molded disk surface features or laser burning is used to facilitate the position graduation mark forming process.

US Patent:

6799246, Sep 28, 2004

Filed:

Dec 16, 1997

Appl. No.:

08/991234

Inventors:

Adrian P. Wise - Bracknell, GB
Kevin Douglas Dewar - Ennis, IE
Anthony Mark Jones - Beaverton OR
Martin William Sotheran - Easter Compton, GB
Colin Smith - Bristol, GB
Helen Rosemary Finch - Bristol, GB
Anthony Peter J. Claydon - Bath, GB
Donald W. Walker Patterson - Winchester MA
Mark Barnes - Chippenham, GB
Andrew Peter Kuligowski - Redland, GB
William Philip Robbins - Bristol, GB
Nicholas Birch - Henleaze, GB
David Andrew Barnes - San Jose CA

Assignee:

Discovision Associates - Irvine CA

International Classification:

G06F 1208

US Classification:

711117, 711217, 711218, 711219, 710 53

Abstract:

A memory interface for connecting a bus to memory comprises an input, a buffer, an address input, a generator, and a writer. The input receives a plurality of data words from the bus. The buffer buffers the data words received from the bus. The address input receives from the bus addresses associated with the plurality of data words. The generator generates a series of addresses in the memory into which the buffered data words may be written. The series of addresses are derived from the received addresses. The writer writes the buffered data words into the memory at the generated addresses.