Individual holder
GREENWOOD MARVIN H
US·4 granted patents·117 citations·filing 1988–1991
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
4 records- 0178US5224724AScooter with simple harmonic driveGREENWOOD MARVIN H·Filed 1991·Granted Jul 6, 1993·60 cites·4 claims
- 0263US4978120ARecreational device having ringsGREENWOOD MARVIN H·Filed 1990·Granted Dec 18, 1990·43 cites·15 claims
- 0337US4896878ARecreational deviceGREENWOOD MARVIN H·Filed 1988·Granted Jan 30, 1990·9 cites·26 claims
- 0436US5211123ASailboardGREENWOOD MARVIN H·Filed 1991·Granted May 18, 1993·5 cites·9 claims
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