Assignee
PETROLEUM DESIGNERS INC
US·4 granted patents·341 citations·filing 1978–1982
Top patents by PatentIndex Score
4 records- 0194US4410186ASealing system for pressurized flanged jointsPETROLEUM DESIGNERS INC·Filed 1982·Granted Oct 18, 1983·126 cites·21 claims
- 0293US4230299APressure balanced gate valve having selective actuator systemsPETROLEUM DESIGNERS INC·Filed 1978·Granted Oct 28, 1980·147 cites·26 claims
- 0382US4179099AExpanding gate valvePETROLEUM DESIGNERS INC·Filed 1978·Granted Dec 18, 1979·37 cites·16 claims
- 0467US4295665AWell casing suspension systemPETROLEUM DESIGNERS INC·Filed 1979·Granted Oct 20, 1981·31 cites·13 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →