Duffield; David J.

Patent Applications and Registrations

Patent applications and USPTO patent grants for Duffield; David J..The latest application filed is for "system for controlling updates of extended data services (eds) data".

Company Profile

0.18.0

Duffield; David J. - Indianapolis IN

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
System for controlling updates of extended data services (EDS) data Grant 5,617,146 - Duffield , et al. April 1, 1	1997-04-01
Automatic letterbox detection Grant 5,486,871 - Filliman , et al. January 23, 1	1996-01-23
Television receiver having the capability to associate any HDTV and any NTSC channel Grant 5,461,427 - Duffield , et al. October 24, 1	1995-10-24
Signal swap apparatus for a television receiver having an HDTV main picture signal processor and an NTSC Pix-in-Pix signal processor Grant 5,453,796 - Duffield , et al. September 26, 1	1995-09-26
Programmable remote control unit without extra key for configuration Grant 5,451,953 - Duffield September 19, 1	1995-09-19
Programmable picture-outside-picture display Grant 5,398,074 - Duffield , et al. March 14, 1	1995-03-14
Video display having progressively dimmed video images and constant brightness auxiliary images Grant 5,386,247 - Shafer , et al. January 31, 1	1995-01-31
Field to field vertical panning system Grant 5,294,987 - Saeger , et al. March 15, 1	1994-03-15
Data transfer from an external computer to a television receiver having picture-in-picture capability Grant 5,113,259 - Romesburg , et al. May 12, 1	1992-05-12
Data transfer from a television receiver having picture-in-picture capability to an external computer Grant 5,111,296 - Duffield , et al. May 5, 1	1992-05-05
Picture-in-picture circuitry using field rate synchronization Grant 5,091,785 - Canfield , et al. February 25, 1	1992-02-25
Television system with zoom capability for at least one inset picture Grant 5,047,857 - Duffield , et al. September 10, 1	1991-09-10
Inset picture centering in a pix-in-pix system Grant 5,031,044 - Canfield , et al. July 9, 1	1991-07-09
User programmable switching arrangement Grant 4,996,597 - Duffield February 26, 1	1991-02-26
Apparatus and a method for automatically centering a video zoom and pan display Grant 4,991,022 - Canfield , et al. February 5, 1	1991-02-05
Tuner control apparatus having tune-by-label capability Grant 4,959,720 - Duffield , et al. September 25, 1	1990-09-25
Tuner control apparatus having tune-by-label capability and using alphabetical label storage Grant 4,914,517 - Duffield April 3, 1	1990-04-03
Fast response picture-in-picture circuitry Grant 4,914,516 - Duffield April 3, 1	1990-04-03

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