Assignee
CULLEN ROY H
4 granted patents·194 citations·filing 1975–1976
Top patents by PatentIndex Score
4 records- 0189US4039237AElectrical power conductor apparatus for earth boringCULLEN ROY H·Filed 1976·Granted Aug 2, 1977·65 cites·27 claims
- 0289US3989330AElectrical kelly cock assemblyCULLEN ROY H·Filed 1975·Granted Nov 2, 1976·77 cites·15 claims
- 0367US4031969AMethod and apparatus for earth boringCULLEN ROY H·Filed 1975·Granted Jun 28, 1977·32 cites·8 claims
- 0454US4016943AMethod for connecting electrical conductors for electric earth boring meansCULLEN ROY H·Filed 1975·Granted Apr 12, 1977·20 cites·12 claims
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