Inventor · disambiguated record
William W. Dollison
Also filed as: DOLLISON WILLIAM W
16 granted patents·438 citations·filing 1979–1992
95Inventor score
Top patents by PatentIndex Score
16 records- 0188US5145005ACasing shut-in valve systemOTIS ENG CO·Filed 1991·Granted Sep 8, 1992·99 cites·21 claims
- 0280US4691511AHydraulic well pumpOTIS ENG CO·Filed 1985·Granted Sep 8, 1987·38 cites·10 claims
- 0379US5310005AFlapper valve assembly with floating hingeHALLIBURTON CO·Filed 1992·Granted May 10, 1994·64 cites·8 claims
- 0470US5082061ARotary locking system with metal sealsOTIS ENG CO·Filed 1990·Granted Jan 21, 1992·49 cites·15 claims
- 0567US5095994AFlow actuated safety valve with retrievable choke and metal sealsOTIS ENGINEERING CORPORTION·Filed 1990·Granted Mar 17, 1992·51 cites·10 claims
- 0664US4680930AHydraulic control circuit and valve assemblyOTIS ENG CO·Filed 1983·Granted Jul 21, 1987·18 cites·30 claims
- 0751US4571939AHydraulic well pumpOTIS ENG CO·Filed 1982·Granted Feb 25, 1986·11 cites·16 claims
- 0848US5133404ARotary running tool for rotary lock mandrelOTIS ENG CO·Filed 1991·Granted Jul 28, 1992·21 cites·10 claims
- 0946US4919205AFriction-reducing deviceDOLLISON WILLIAM W·Filed 1989·Granted Apr 24, 1990·19 cites·12 claims
- 1046US4252149ATool diverterOTIS ENG CO·Filed 1979·Granted Feb 24, 1981·12 cites·7 claims
- 1145US4776401AFoot valve for pumping wellsOTIS ENG CO·Filed 1987·Granted Oct 11, 1988·17 cites·14 claims
- 1242US4969515AExpendable devices for well lock systemOTIS ENG CO·Filed 1989·Granted Nov 13, 1990·13 cites·29 claims
- 1340US4491055AControl of continuous reciprocation of a fluid power cylinderOTIS ENG CO·Filed 1981·Granted Jan 1, 1985·6 cites·13 claims
- 1439US4312378ATool diverterOTIS ENG CO·Filed 1980·Granted Jan 26, 1982·10 cites·4 claims
- 1537US4693171APosition responsive valve control for hydraulic cylinderOTIS ENG CO·Filed 1985·Granted Sep 15, 1987·6 cites·7 claims
- 1634US5141023AFlow actuated safety valveOTIS ENG CO·Filed 1991·Granted Aug 25, 1992·4 cites·25 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →