Inventor · disambiguated record
Douglas F Kirkman
Also filed as: KIRKMAN DOUGLAS F · KIRKMAN DOUGLAS FREDERICK
8 granted patents·154 citations·filing 1993–2009
88Inventor score
Top patents by PatentIndex Score
8 records- 0184US6895995B2Liquid flow regulatorKOP LTD·Filed 2002·Granted May 24, 2005·45 cites·23 claims
- 0278US8011434B2Subsea securing devicesM S C M LTD·Filed 2008·Granted Sep 6, 2011·23 cites·18 claims
- 0368US7810518B2Sub-sea solenoid valvesM S C M LTD·Filed 2007·Granted Oct 12, 2010·5 cites·8 claims
- 0466US6148858APressure balanced couplingsMANDEVILLE ENG LTD·Filed 1998·Granted Nov 21, 2000·26 cites·19 claims
- 0563US5810047ASub-sea coupling with conical sealMANDEVILLE ENG LTD·Filed 1997·Granted Sep 22, 1998·29 cites·7 claims
- 0642US5479960AFluid couplings and sealsFiled 1993·Granted Jan 2, 1996·18 cites·9 claims
- 0739US6276396B1Directional control valvesMANDEVILLE ENG LTD·Filed 1999·Granted Aug 21, 2001·8 cites·10 claims
- 0834US8196607B2Subsea couplingKIRKMAN DOUGLAS FREDERICK·Filed 2009·Granted Jun 12, 2012·0 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →