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

John Fort — 1 Patent

RORotomaster: 1 patents #4 of 6Top 70%
Calabasas, CA: #2,257 of 4,119 inventorsTop 55%
California: #249,524 of 386,348 inventorsTop 65%
Overall (All Time): #2,406,284 of 4,157,543Top 60%
1 Patents All Time
John Fort has been granted 1 US patent while listed as an inventor at Rotomaster. All of these patents were granted in 1985. John Fort ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list John Fort in Calabasas, CA, US.

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4504187 Turbocharger method of operation and turbine housing therefor Hugh MacInnes, Jon A. Meyer, Andrew E. Johnston 1985-03-12