Assignee
BARDWELL ALLEN E
US·3 granted patents·116 citations·filing 1982–1990
Top patents by PatentIndex Score
3 records- 0188US4466498ADetachable shoe plates for large diameter drill bitsBARDWELL ALLEN E·Filed 1982·Granted Aug 21, 1984·111 cites·10 claims
- 0227US5022474AMultiple blow percussion drill assembly with rapid field maintenance and adjustment capabilityBARDWELL ALLEN E·Filed 1990·Granted Jun 11, 1991·4 cites·19 claims
- 0326US4440245AGravity percussion drill with upper end cocking spring and method of assemblyBARDWELL ALLEN E·Filed 1982·Granted Apr 3, 1984·1 cites·18 claims
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