Assignee
JOHNSTONE PUMP GEN VALVE
US·14 granted patents·276 citations·filing 1982–1998
Top patents by PatentIndex Score
14 records- 0189US4929041ACathodoluminescence system for use in a scanning electron microscope including means for controlling optical fiber apertureJOHNSTONE PUMP GEN VALVE·Filed 1989·Granted May 29, 1990·41 cites·19 claims
- 0287US5372352AApparatus for sealing a fluid carrying deviceJOHNSTONE PUMP GEN VALVE·Filed 1990·Granted Dec 13, 1994·63 cites·11 claims
- 0373US4666124AValve operator for a plug-type valveJOHNSTONE PUMP GEN VALVE·Filed 1986·Granted May 19, 1987·37 cites·8 claims
- 0468US4491145AToggle gate valveJOHNSTONE PUMP GEN VALVE·Filed 1982·Granted Jan 1, 1985·24 cites·5 claims
- 0561US4662394ATight shut-off valve with flow control elementJOHNSTONE PUMP GEN VALVE·Filed 1986·Granted May 5, 1987·18 cites·12 claims
- 0657US5979488ABleed systemJOHNSTONE PUMP GEN VALVE·Filed 1998·Granted Nov 9, 1999·19 cites·6 claims
- 0753US4679764AAutomatic valve actuator and control systemJOHNSTONE PUMP GEN VALVE·Filed 1984·Granted Jul 14, 1987·26 cites·8 claims
- 0845US4623119APlug valveJOHNSTONE PUMP GEN VALVE·Filed 1985·Granted Nov 18, 1986·13 cites·4 claims
- 0940US5385332AFlow stabilized, retractable seal, double-block and bleed plug valveJOHNSTONE PUMP GEN VALVE·Filed 1994·Granted Jan 31, 1995·8 cites·10 claims
- 1037US5542644APlug-valve having a plug assembly with retractible seals that can be removed without leakageJOHNSTONE PUMP GEN VALVE·Filed 1995·Granted Aug 6, 1996·7 cites·12 claims
- 1136US5011115ASelf supporting plug for a double block and bleed plug valveJOHNSTONE PUMP GEN VALVE·Filed 1989·Granted Apr 30, 1991·7 cites·4 claims
- 1235US5392813AIntegral bleed system for valveJOHNSTONE PUMP GEN VALVE·Filed 1991·Granted Feb 28, 1995·9 cites·10 claims
- 1330US5931192AExternal unified integral bleed system for valvesJOHNSTONE PUMP GEN VALVE·Filed 1996·Granted Aug 3, 1999·4 cites·11 claims
- 1430US4617964ATight shut-off valve with flow controlJOHNSTONE PUMP GEN VALVE·Filed 1985·Granted Oct 21, 1986·0 cites·6 claims
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