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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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William C. Roach — 4 Patents

DEDigital Equipment: 4 patents #305 of 2,100Top 15%
Salt Lake City, UT: #1,143 of 4,590 inventorsTop 25%
Utah: #4,871 of 19,430 inventorsTop 30%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
William C. Roach has been granted 4 US patents while listed as an inventor at Digital Equipment. The first was granted in 1990 and the most recent in October 1993. William C. Roach ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list William C. Roach in Salt Lake City, UT, US.

Patents per Year

Patents granted per year, 1990 to 1993Bar chart with a peak of 2 patents in 1992.peak 21990: 1 patents19901992: 2 patents19921993: 1 patents1993

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
5251322 Method of operating a computer graphics system including asynchronously traversing its nodes Peter L. Doyle, John P. Ellenberger, Ellis Oliver Jones, David C. Carver, Steven D. DiPirro +5 more 1993-10-05 $8,551,000
5155822 High performance graphics workstation Peter L. Doyle, John P. Ellenberger, Ellis Oliver Jones, David C. Carver, Steven D. DiPirro +5 more 1992-10-13 $5,763,000
5097411 Graphics workstation for creating graphics data structure which are stored retrieved and displayed by a graphics subsystem for competing programs Peter L. Doyle, John P. Ellenberger, Ellis Oliver Jones, David C. Carver, Steven D. DiPirro +5 more 1992-03-17 $9,664,000
4928247 Method and apparatus for the continuous and asynchronous traversal and processing of graphics data structures Peter L. Doyle, John P. Ellenberger, Ellis Oliver Jones, David C. Carver, Steven D. DiPirro +5 more 1990-05-22 $23,255,000