David A Schultz

US Patent:

7882165, Feb 1, 2011

Filed:

Apr 21, 2006

Appl. No.:

11/408364

Inventors:

James M. Simkins - Park City UT, US
Jennifer Wong - Fremont CA, US
Bernard J. New - Carmel Valley CA, US
Alvin Y. Ching - Sunnyvale CA, US
John M. Thendean - Berkeley CA, US
Anna Wing Wah Wong - Santa Clara CA, US
Vasisht Mantra Vadi - San Jose CA, US
David P. Schultz - San Jose CA, US

Assignee:

Xilinx, Inc. - San Jose CA

International Classification:

G06F 7/38

US Classification:

708490

Abstract:

A digital signal processing circuit including: a multiplier circuit; a plurality of multiplexers coupled to the multiplier circuit and controlled by a first opcode; and an arithmetic logic unit coupled to plurality of multiplexers and controlled by a second opcode.

US Patent:

49829335, Jan 8, 1991

Filed:

Aug 19, 1988

Appl. No.:

7/233830

Inventors:

David H. Schultz - Grand Haven MI

Assignee:

Harbor Towne Fence, Inc. - Grand Haven MI

International Classification:

E04H 1714

US Classification:

256 65

Abstract:

A fence adapted for mounting on level or uneven terrain includes generally vertical posts, generally horizontal hollow rails, and connector clips for attaching the rails to the posts. The connector clips are received within the inner cavity of the hollow rails and include an elongated opening which is adapted to receive therethrough a stud attached to the vertical post. About the opening and within the rail is provided a retaining structure which facilitates easy insertion of the stud, at various angles, but securely resists withdrawal thereof. The length of the opening is substantially greater than the width of the stud received therethrough, so that deviations of the post from a true vertical position and/or deviations of the rail from a true horizontal position in the erection of the fence on an uneven terrain may be accommodated.

US Patent:

53478991, Sep 20, 1994

Filed:

May 11, 1993

Appl. No.:

8/062452

Inventors:

David Schultz - Grand Haven MI
Donald E. Heinz - West Olive MI

Assignee:

M & S Tool and Die Company - Grand Haven MI

International Classification:

B26D 106
B26D 702

US Classification:

83 50

Abstract:

An apparatus for punching a line of apertures in a workpiece having a channel. The apparatus comprises a punch press mounted to a base over a work space, a removable punch tool mounted on the punch press, an elongated table slidably mounted to the base having a line of travel extending through the work space, a mandrel, a clamping mechanism on the table for clamping a workpiece thereon with the workpiece channel aligned with the mandrel, and a drive mechanism for selectively moving the table in increments as the punch press sequentially strokes. When the workpiece is clamped to the table, it will be incrementally drawn along the mandrel, the mandrel being in the channel, and repeatedly punched by the punch tool, as the table is moved through the work space.

US Patent:

49519255, Aug 28, 1990

Filed:

Jan 28, 1988

Appl. No.:

7/149691

Inventors:

David H. Schultz - Grand Haven MI
Steven W. Mattson - Muskegon MI
Donald E. Heinz - West Olive MI

Assignee:

Alternate Number Thirteen - Grand Haven MI

International Classification:

E04H 1714

US Classification:

256 65

Abstract:

A fence and connector assembly having connector brackets mounted near the top and bottom of the fence posts, each bracket having a vertical sleeve and side flange members spaced to receive the ends of rails therebetween, and L-shaped bracket securing and rail mounting studs between the flange members. The rails have limited pivotal movement on the distal ends of these studs to accommodate uneven terrain, and are secured thereon by spring retainers within the rails. Between the vertically spaced, generally horizontal rails are vertical rungs, each having its lower end in aperture in the lower hollow rail and its upper end in an aperture into the upper hollow rail. Locking rods extend through the rails and through these transverse apertures adjacent the ends of the rungs, securing the rungs to the rails.

US Patent:

49865137, Jan 22, 1991

Filed:

May 7, 1990

Appl. No.:

7/520275

Inventors:

David H. Schultz - Grand Haven MI
Steven W. Mattson - Muskegon MI
Donald E. Heinz - West Olive MI

Assignee:

Harbor Towne Fence, Inc. - Grand Haven MI

International Classification:

E04H 1714

US Classification:

256 65

Abstract:

A fence and connector assembly having connector brackets mounted near the top and bottom of the fence posts, each bracket having a vertical sleeve and side flange members spaced to receive the ends of rails therebetween, and L-shaped bracket securing and rail mounting studs between the flange members. The rails have limited pivotal movement on the distal ends of these studs to accommodate uneven terrain, and are secured thereon by spring retainers within the rails. Between the vertically spaced, generally horizontal rails are vertical rungs, each having its lower end in an aperture in the lower hollow rail and its upper end in an aperture into the upper hollow rail. Locking rods extend through the rails and through these transverse apertures adjacent the ends of the rungs, securing the rungs to the rails.