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

John D. Douma — 3 Patents

Ford: 2 patents #6,478 of 17,473Top 40%
BSBernal Rotary Systems: 1 patents #4 of 7Top 60%
Royal Oak, MI: #434 of 1,428 inventorsTop 35%
Michigan: #27,426 of 86,293 inventorsTop 35%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
John D. Douma has been granted 3 US patents while listed as an inventor at Ford. The first was granted in 1986 and the most recent in December 2009. John D. Douma ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list John D. Douma in Royal Oak, MI, US.

Patents per Year

Patents granted per year, 1986 to 2009Bar chart with a peak of 1 patents in 1986.peak 11986: 1 patents19862008: 1 patents20082009: 1 patents2009

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
7631571 Yoke assembly for a power steering apparatus Madhu Nambiar, Luis Carballo, Jr., Brian Robert Burchart, Michael Patrick Rodgers 2009-12-15 $66,888,000
7458291 Self-sealing yoke assembly for a steering apparatus John Francis Laidlaw, Madhu Nambiar 2008-12-02 $12,172,000
4608895 Rotary die cutting Jerry L. Bell, David P. Keinath, Robert E. Moore 1986-09-02