Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
KD

Keith G. Doyle — 3 Patents

ZIZed Instruments: 2 patents #2 of 9Top 25%
Sunbury-on-Thames, GB: #9 of 45 inventorsTop 20%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
Keith G. Doyle has been granted 3 US patents while listed as an inventor at Zed Instruments. The first was granted in 1980 and the most recent in January 1987. Keith G. Doyle ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Keith G. Doyle in Sunbury-on-Thames, GB.

Patents per Year

Patents granted per year, 1980 to 1987Bar chart with a peak of 1 patents in 1980.peak 11980: 1 patents19801982: 1 patents19821987: 1 patents1987

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
4635289 Method and apparatus for inspecting printed wiring boards Roy Lloyd 1987-01-06
4323928 Copying process for producing a seamless copy from an unjointed original Peter M. Zollman 1982-04-06
4232345 Apparatus for producing a seamless copy from an unjointed original Peter M. Zollman 1980-11-04