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USPTO Patent Rankings Data through Dec 31, 2025
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Felix Wankel — 15 Patents

UNUnknown: 2 patents #12,644 of 83,584Top 20%
Aisin Seiki Kabushiki Kaisha: 1 patents #2,094 of 3,782Top 60%
Gettorf, DE: #9 of 176 inventorsTop 6%
Overall (All Time): #307,048 of 4,157,543Top 8%
15 Patents All Time
Felix Wankel has been granted 15 US patents while listed as an inventor at Unknown. The first was granted in 1980 and the most recent in October 1990. Felix Wankel ranks #307,048 of 4,157,543 US inventors in our database (top 7.4%). Patent records list Felix Wankel in Gettorf, DE.

Patents per Year

Patents granted per year, 1980 to 1990Bar chart with a peak of 4 patents in 1988.peak 41980: 2 patents19801981: 2 patents19811984: 1 patents19841985: 2 patents19851986: 1 patents19861987: 1 patents19871988: 4 patents19881989: 1 patents19891990: 1 patents1990

Issued Patents All Time

Showing 1–15 of 15 patents

Patent #TitleCo-InventorsDate
4960370 Internal axis rotary piston machine Frank Obrist, by Gerhard Renz, executor, by Fried Meysen, executor, by Thomas Burkhardt, executor 1990-10-02
4801255 Internal axis single-rotation machine with intermeshing internal and external rotors 1989-01-31
4793781 External and internal rotor machine having internal axes and circumferential reinforcement web 1988-12-27
4783083 Fluid pressure operated sealing process and sealing means 1988-11-08
4753584 Single-rotation machine having internal and external rotors with axial cooling ducts for the external rotor 1988-06-28
4735561 Machine having plural fixed internal axes with reinforced rotor 1988-04-05
4714417 Internal axis single-rotation machine with intermeshing internal and external rotors 1987-12-22
4626182 External shaft rotary piston machine 1986-12-02
4561836 Rotary piston machine 1985-12-31
4540356 Internal axis crankless rotary piston engine 1985-09-10
4490101 Internally axed rotary piston engine 1984-12-25
4305424 Valve assembly 1981-12-15
4296936 Seal mechanism for the rotor periphery of a rotary piston engine 1981-10-27
4207830 Water foil 1980-06-17
4203381 Water foil 1980-05-20