David L. Walker

Follow

Person

Glendora, CA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Hybrid bridge magnetic deflection amplifier
- Patent number 6,087,789
- Issue date Jul 11, 2000
- Steven Spears
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
System and method to improve the quality of reproduced images on a...
- Patent number 5,666,156
- Issue date Sep 9, 1997
- Steven Spears
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Non-sequential raster scanning apparatus and method
- Patent number 5,179,314
- Issue date Jan 12, 1993
- David L. Walker
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Real time registration weave correction system
- Patent number 5,150,957
- Issue date Sep 29, 1992
- David L. Walker
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Video noise reduction system
- Patent number 4,987,481
- Issue date Jan 22, 1991
- Walker Digital Audio Video Systems, Inc.
- Steven Spears
- H04 - ELECTRIC COMMUNICATION TECHNIQUE