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Douglas J. Doornink
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Portland, OR, US
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last 30 patents
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Patent Grant
Local display bus architecture and communications method for Raster...
Patent number
5,185,599
Issue date
Feb 9, 1993
Tektronix, Inc.
Douglas J. Doornink
G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information
Patent Grant
Method and apparatus for hidden surface removal
Patent number
5,084,830
Issue date
Jan 28, 1992
Tektronix, Inc.
Douglas J. Doornink
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Circuit and method for producing a full-screen cross-hair cursor on...
Patent number
4,190,834
Issue date
Feb 26, 1980
Tektronix, Inc.
Douglas J. Doornink
G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information
Patent Grant
Display system utilizing digital-analog vector generation
Patent number
4,157,537
Issue date
Jun 5, 1979
Tektronix, Inc.
Thomas B. Cheek
G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS