Individual holder
TWITCHELL BRENT L
4 granted patents·326 citations·filing 1979–1980
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
4 records- 0195US4243147AThree-dimensional liftTWITCHELL BRENT L·Filed 1979·Granted Jan 6, 1981·225 cites·21 claims
- 0273US4351562AMovable seat for a motorized transport chairTWITCHELL BRENT L·Filed 1980·Granted Sep 28, 1982·60 cites·9 claims
- 0370USD266499SInvalid chairTWITCHELL BRENT L·Filed 1979·Granted Oct 12, 1982·10 cites·1 claims
- 0460US4268054AChild transport vehicleTWITCHELL BRENT L·Filed 1979·Granted May 19, 1981·31 cites·12 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →