Inventor · disambiguated record
Ernest P. Fisher, Jr.
Also filed as: FISHER ERNEST P · FISHER ERNEST P JR · FISHER JR ERNEST P
12 granted patents·259 citations·filing 1978–1984
92Inventor score
Files withOTIS ENG CO12
Top patents by PatentIndex Score
12 records- 0184US4436152AShifting toolOTIS ENG CO·Filed 1982·Granted Mar 13, 1984·65 cites·5 claims
- 0277US4483543ASealsOTIS ENG CO·Filed 1983·Granted Nov 20, 1984·35 cites·5 claims
- 0369US4630833AMolded ring seal with end support ringsOTIS ENG CO·Filed 1984·Granted Dec 23, 1986·23 cites·32 claims
- 0464US4362211ALocking mandrelOTIS ENG CO·Filed 1980·Granted Dec 7, 1982·29 cites·18 claims
- 0561US4378839AWell toolOTIS ENG CO·Filed 1981·Granted Apr 5, 1983·27 cites·11 claims
- 0660US4294315ALanding nippleOTIS ENG CO·Filed 1978·Granted Oct 13, 1981·22 cites·12 claims
- 0746US4432416AWell flow control apparatusOTIS ENG CO·Filed 1982·Granted Feb 21, 1984·14 cites·20 claims
- 0844US4428557ASingle line deep depth safety valveOTIS ENG CO·Filed 1982·Granted Jan 31, 1984·13 cites·4 claims
- 0943US4489743ADifferential gas lift valveOTIS ENG CO·Filed 1982·Granted Dec 25, 1984·8 cites·10 claims
- 1038US4193450ASurface controlled subsurface safety valveOTIS ENG CO·Filed 1978·Granted Mar 18, 1980·8 cites·10 claims
- 1136US4352366AVelocity operated standing valveOTIS ENG CO·Filed 1980·Granted Oct 5, 1982·8 cites·16 claims
- 1235US4381822ALanding nippleOTIS ENG CO·Filed 1981·Granted May 3, 1983·7 cites·8 claims
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