Individual holder
BRISTOL ROBERT D
5 granted patents·97 citations·filing 1978–1982
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
5 records- 0178US4211082AInternal combustion engine with free floating auxiliary pistonBRISTOL ROBERT D·Filed 1978·Granted Jul 8, 1980·42 cites·15 claims
- 0260US4363299ACrankless internal combustion engineBRISTOL ROBERT D·Filed 1980·Granted Dec 14, 1982·18 cites·13 claims
- 0356US4465042ACrankless internal combustion engineBRISTOL ROBERT D·Filed 1982·Granted Aug 14, 1984·15 cites·29 claims
- 0452US4321904AInternal combustion engine with auxiliary combustion chamberBRISTOL ROBERT D·Filed 1980·Granted Mar 30, 1982·14 cites·12 claims
- 0550US4401068AApparatus for split engine operationBRISTOL ROBERT D·Filed 1980·Granted Aug 30, 1983·8 cites·21 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →