Individual holder
CAMPBELL JOSEPH K
CA·4 granted patents·91 citations·filing 1976–1982
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
4 records- 0182US4317586APipe stress/strain neutralizerCAMPBELL JOSEPH K·Filed 1979·Granted Mar 2, 1982·46 cites·2 claims
- 0261US4482171APipe stress/strain neutralizersCAMPBELL JOSEPH K·Filed 1982·Granted Nov 13, 1984·21 cites·8 claims
- 0348US4475750APipe stress/strain neutralizer with hydraulically balanced spherical elementCAMPBELL JOSEPH K·Filed 1982·Granted Oct 9, 1984·16 cites·5 claims
- 0436US4018463APipe stress/strain neutralizerCAMPBELL JOSEPH K·Filed 1976·Granted Apr 19, 1977·8 cites·7 claims
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