Inventor
Arno G. Ledebuhr
Inventor
Pleasanton, CA, US
Overview
Patents· 15 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H04Nprimary
H04NPictorial communication, e.g. television57%
G02BOptical elements, systems or apparatus22%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein22%
PatentTitleYear
5,907,437'Converging optics for a single light valve full-color projector'19995,363,222'Compact optical system for a single light valve full-color projector'19945,170,250'Full-color light valve projection apparatus having internal image registration system'19925,111,315'Optical system for illuminating a light valve'19924,911,547'Compact optical system for a single light valve projector using two axes of polarization'19904,842,374'Unitary prepolarizing prism assembly for a four color liquid crystal light valve image projector'19894,836,649'Optical layout for a three light valve full-color projector employing a dual relay lens system and a single projection lens'19894,826,293'Electron beam addressed liquid crystal light valve with input sheet conductor'19894,826,311'Prism assembly with three periscopes and projection lenses for a single light valve full-color projector'19894,824,214'Unitary prepolarizing prism assembly for a four color liquid crystal light valve image projector'19894,786,146'Color sequential illumination system for a liquid crystal light valve'19884,749,259'Liquid crystal image projection with multicolor prepolarizing system'19884,728,174'Electron beam addressed liquid crystal light valve'19884,690,526'Prism assembly for a single light valve full-color projector'19874,687,301'Full-color projector system with a tricolor-separating prism'1987Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1987–1994Patents assigned to HUGHES AIRCRAFT CO (14)· patent assignee history
1987–1989Based in Fullerton, CA, US· patent location history
1988–1994Based in Pleasanton, CA, US· patent location history
1988Based in Plesanton, CA, US· patent location history
1999Patents assigned to HUGHES JVC TECH CORP (1)· patent assignee history
1999Based in Tracy, CA, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HUGHES AIRCRAFT CO | 14 | 1987–1994 |
| HUGHES JVC TECH CORP | 1 | 1999 |
Locations
| Location | Patents | Span |
|---|---|---|
| Pleasanton, California, US | 9 | 1988–1994 |
| Fullerton, California, US | 4 | 1987–1989 |
| Tracy, California, US | 1 | 1999 |
| Plesanton, California, US | 1 | 1988 |