Individual holder
LANGEVIN DONALD R
3 granted patents·22 citations·filing 1975–1985
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
3 records- 0150US4572330ALadder for boarding small boatsLANGEVIN DONALD R·Filed 1985·Granted Feb 25, 1986·14 cites·7 claims
- 0242US4014397AElectrical counting scaleLANGEVIN DONALD R·Filed 1976·Granted Mar 29, 1977·8 cites·14 claims
- 0321US4023631AAdjustable balance and indicating deviceLANGEVIN DONALD R·Filed 1975·Granted May 17, 1977·0 cites·20 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →