Individual holder
SEYBOLD FREDERICK W
4 granted patents·50 citations·filing 1974–1986
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
4 records- 0177US4057374ARotary internal combustion engine with uniformly rotating pistons cooperating with reaction elements having a varying speed of rotation and oscillating motionSEYBOLD FREDERICK W·Filed 1976·Granted Nov 8, 1977·20 cites·8 claims
- 0251US3955541ARotary internal combustion engine with uniformly rotating pistons cooperating with reaction elements having a varying speed of rotationSEYBOLD FREDERICK W·Filed 1974·Granted May 11, 1976·13 cites·3 claims
- 0346US4455128ARotary internal combustion engine with uniformly rotating pistons cooperating with reaction elements having a varying speed of rotation and oscillating motionSEYBOLD FREDERICK W·Filed 1981·Granted Jun 19, 1984·12 cites·7 claims
- 0430US4687427ARotary internal combustion engine with uniformly rotating pistons cooperating with reaction elements having a varying speed of rotation and oscillating motionSEYBOLD FREDERICK W·Filed 1986·Granted Aug 18, 1987·5 cites·7 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →