Inventor · disambiguated record
Neil H. Akkerman
Also filed as: AKKERMAN NEIL · AKKERMAN NEIL H
82 granted patents·1 pending application·2,282 citations·filing 1976–2020
99Inventor score
Top patents by PatentIndex Score
83 records- 0199US5195721AFail safe valve actuatorAVA INT CORP·Filed 1991·Granted Mar 23, 1993·188 cites·39 claims
- 0298US11471662B2High efficiency blood pumpEVERHEART SYSTEMS INC·Filed 2020·Granted Oct 18, 2022·22 cites·18 claims
- 0397US11065437B2Cardiac support systems and methods for chronic useEVERHEART SYSTEMS INC·Filed 2019·Granted Jul 20, 2021·15 cites·14 claims
- 0495US10731445B2Top-down fracturing systemAKKERMAN NEIL H·Filed 2016·Granted Aug 4, 2020·11 cites·40 claims
- 0595US8551163B2Cardiac support systems and methods for chronic useABER GREG S·Filed 2011·Granted Oct 8, 2013·78 cites·33 claims
- 0695US5295907ARorque limiting deviceAVA INT CORP·Filed 1992·Granted Mar 22, 1994·62 cites·2 claims
- 0794US9415147B2High efficiency blood pumpEVERHEART SYSTEMS INC·Filed 2015·Granted Aug 16, 2016·14 cites·18 claims
- 0893US4852648AWell installation in which electrical current is supplied for a source at the wellhead to an electrically responsive device located a substantial distance below the wellheadAVA INT CORP·Filed 1987·Granted Aug 1, 1989·136 cites·27 claims
- 0991US4440223AWell slip assembliesAVA INT CORP·Filed 1982·Granted Apr 3, 1984·90 cites·3 claims
- 1090US5513703AMethods and apparatus for perforating and treating production zones and otherwise performing related activities within a wellAVA INT CORP·Filed 1994·Granted May 7, 1996·116 cites·33 claims
- 1189US4225110AActuator for converting linear to rotary motionBAKER GAC INC·Filed 1978·Granted Sep 30, 1980·54 cites·15 claims
- 1284US11085278B2Top-down fracturing systemABD TECH LLC·Filed 2019·Granted Aug 10, 2021·3 cites·22 claims
- 1384US4475599AValve for subterranean wellsBAKER INT CORP·Filed 1981·Granted Oct 9, 1984·62 cites·20 claims
- 1484US4062406AValve and lubricator apparatusBAKER INT CORP·Filed 1976·Granted Dec 13, 1977·44 cites·54 claims
- 1583US9227001B2High efficiency blood pumpAKKERMAN NEIL H·Filed 2010·Granted Jan 5, 2016·11 cites·15 claims
- 1683US5411096ASurface controlled, subsurface tubing safety valveFiled 1994·Granted May 2, 1995·45 cites·20 claims
- 1783US4103744ASafety valve and ball type equalizing valveBAKER INT CORP·Filed 1977·Granted Aug 1, 1978·52 cites·35 claims
- 1882US9512683B2Disconnect assembly for cylindrical membersAKKERMAN NEIL H·Filed 2012·Granted Dec 6, 2016·6 cites·30 claims
- 1980US10568998B2High efficiency blood pumpEVERHEART SYSTEMS INC·Filed 2016·Granted Feb 25, 2020·2 cites·18 claims
- 2080US4783046APneumatic valve actuatorsAVA INT CORP·Filed 1987·Granted Nov 8, 1988·35 cites·10 claims
- 2179US4135547AQuick disengaging valve actuatorBAKER INT CORP·Filed 1977·Granted Jan 23, 1979·43 cites·28 claims
- 2278US4421174ACyclic annulus pressure controlled oil well flow valve and methodBAKER INT CORP·Filed 1981·Granted Dec 20, 1983·48 cites·11 claims
- 2378US4393929AWell packers and slip assemblies for use therewithAVA INTERNATIONAL·Filed 1981·Granted Jul 19, 1983·50 cites·13 claims
- 2477US11142997B2Flow transported obturating tool and methodABD TECH LLC·Filed 2019·Granted Oct 12, 2021·2 cites·17 claims
- 2576US4641707AWell apparatusAVA INT CORP·Filed 1984·Granted Feb 10, 1987·44 cites·21 claims
- 2675US4187870AValve actuator and pilot assembly thereforBAKER INT CORP·Filed 1978·Granted Feb 12, 1980·26 cites·17 claims
- 2773US4591197AWire line running and/or pulling toolAVA INT CORP·Filed 1985·Granted May 27, 1986·46 cites·12 claims
- 2872US4488595AWell tool having a slip assemblyAKKERMAN NEIL H·Filed 1983·Granted Dec 18, 1984·37 cites·26 claims
- 2972US4297088APump assembly comprising gas spring meansBAKER INT CORP·Filed 1979·Granted Oct 27, 1981·19 cites·28 claims
- 3071US4540047AFlow controlling apparatusAVA INT CORP·Filed 1983·Granted Sep 10, 1985·35 cites·56 claims
- 3171US4130166AValve and lubricator apparatusBAKER INT CORP·Filed 1977·Granted Dec 19, 1978·27 cites·1 claims
- 3270US4768594AValvesAVA INT CORP·Filed 1986·Granted Sep 6, 1988·39 cites·66 claims
- 3369US8393241B2Sequential gear shifting mechanismAKKERMAN NEIL H·Filed 2009·Granted Mar 12, 2013·5 cites·25 claims
- 3469US5465786ASubsurface tubing safety valveDRESSER IND·Filed 1994·Granted Nov 14, 1995·48 cites·10 claims
- 3569US4488596ALocking apparatus for use in a subterranean wellBAKER INT CORP·Filed 1983·Granted Dec 18, 1984·32 cites·8 claims
- 3669US4325431AFlow controlling apparatusAVA INT CORP·Filed 1980·Granted Apr 20, 1982·33 cites·16 claims
- 3768US5095978AHydraulically operated permanent type well packer assemblyAVA INTERNATIONAL·Filed 1991·Granted Mar 17, 1992·46 cites·19 claims
- 3867US4407363ASubsurface well apparatusAVA INTERNATIONAL·Filed 1981·Granted Oct 4, 1983·33 cites·64 claims
- 3966US4542792AMethod and removable auxiliary apparatus for permanently locking open a well flow control deviceBAKER OIL TOOLS INC·Filed 1984·Granted Sep 24, 1985·31 cites·18 claims
- 4066US4470340ALocking mechanism for fluid operated actuatorBAKER CAC·Filed 1982·Granted Sep 11, 1984·15 cites·2 claims
- 4166US4263839AHeat sensitive locking deviceBAKER CAC·Filed 1979·Granted Apr 28, 1981·14 cites·6 claims
- 4265US4519575AValves and valve actuatorsAVA INT CORP·Filed 1984·Granted May 28, 1985·31 cites·15 claims
- 4364US4345651AApparatus and method for the mechanical sequential release of cementing plugsBAKER INT CORP·Filed 1980·Granted Aug 24, 1982·30 cites·8 claims
- 4463US4248138AFail safe locking mechanism for fluid operated valve actuatorBAKER CAC·Filed 1978·Granted Feb 3, 1981·13 cites·1 claims
- 4563US4157167AValve actuator and pilot assembly thereforBAKER INT CORP·Filed 1977·Granted Jun 5, 1979·15 cites·54 claims
- 4662US4505332AWell packersAVA INT CORP·Filed 1982·Granted Mar 19, 1985·26 cites·26 claims
- 4761US7353697B2System for mounting an engine to a frameAKKERMAN NEIL H·Filed 2004·Granted Apr 8, 2008·9 cites·32 claims
- 4861US4477104AReleasable latching apparatusAVA INT CORP·Filed 1981·Granted Oct 16, 1984·26 cites·28 claims
- 4960US5358053ASubsurface safety valveAVA INT CORP·Filed 1993·Granted Oct 25, 1994·32 cites·4 claims
- 5060US5263847ASubsurface tubing safety valveAVA INT CORP·Filed 1992·Granted Nov 23, 1993·37 cites·4 claims
Showing the top 50 of 83 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →