Inventor · disambiguated record
Craig R. Hyland
Also filed as: HYLAND CRAIG R
12 granted patents·902 citations·filing 1980–2001
94Inventor score
Files withCHRISTENSEN INC NORTON3CHRISTENSEN INC2EASTMAN CHRISTENSEN CO1JAPAN NAT OIL CORP1TERRA TEK INC1
Top patents by PatentIndex Score
12 records- 0197US5322019ASystem for the initiation of downhole explosive and propellant systemsTERRA TEK INC·Filed 1991·Granted Jun 21, 1994·138 cites·45 claims
- 0297US4429741ASelf powered downhole tool anchorCHRISTENSEN INC·Filed 1981·Granted Feb 7, 1984·266 cites·10 claims
- 0396US4904228AUniversal ball jointCHRISTENSEN INC NORTON·Filed 1984·Granted Feb 27, 1990·109 cites·26 claims
- 0488US6216804B1Apparatus for recovering core samples under pressureFiled 1998·Granted Apr 17, 2001·92 cites·74 claims
- 0585US6659204B2Method and apparatus for recovering core samples under pressureJAPAN NAT OIL CORP·Filed 2001·Granted Dec 9, 2003·52 cites·33 claims
- 0685US6378631B1Apparatus for recovering core samples at in situ conditionsFiled 2000·Granted Apr 30, 2002·53 cites·27 claims
- 0783US6305482B1Method and apparatus for transferring core sample from core retrieval chamber under pressure for transportFiled 2000·Granted Oct 23, 2001·48 cites·20 claims
- 0877US6230825B1Apparatus for recovering core samples under pressureFiled 2000·Granted May 15, 2001·35 cites·6 claims
- 0969US4356872ADownhole core barrel flushing systemCHRISTENSEN INC·Filed 1980·Granted Nov 2, 1982·35 cites·15 claims
- 1061US4580635AAutomatic drill pipe inside wiperCHRISTENSEN INC NORTON·Filed 1983·Granted Apr 8, 1986·26 cites·10 claims
- 1160US4552229AExternally powered core catcherCHRISTENSEN INC NORTON·Filed 1983·Granted Nov 12, 1985·25 cites·18 claims
- 1251US4878548ANozzle retention system for a drill bitEASTMAN CHRISTENSEN CO·Filed 1988·Granted Nov 7, 1989·23 cites·16 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →