Assignee
BERNHARDT & FREDERICK CO INC
US·3 granted patents·242 citations·filing 1979–1982
Top patents by PatentIndex Score
3 records- 0192US4262693AKelly valveBERNHARDT & FREDERICK CO INC·Filed 1979·Granted Apr 21, 1981·141 cites·12 claims
- 0282US4377179APressure balanced ball valve deviceBERNHARDT & FREDERICK CO INC·Filed 1980·Granted Mar 22, 1983·70 cites·6 claims
- 0363US4565213ABall valve device with hold-open tubeBERNHARDT & FREDERICK CO INC·Filed 1982·Granted Jan 21, 1986·31 cites·3 claims
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