Inventor · disambiguated record
John M. Birckhead
Also filed as: BIRCKHEAD JOHN · BIRCKHEAD JOHN M
4 granted patents·2 pending applications·246 citations·filing 1997–2014
81Inventor score
Top patents by PatentIndex Score
6 records- 0189US7819198B2Friction spring release mechanismBIRCKHEAD JOHN M·Filed 2006·Granted Oct 26, 2010·71 cites·30 claims
- 0285US6536522B2Artificial lift apparatus with automated monitoring characteristicsWEATHERFORD LAMB·Filed 2001·Granted Mar 25, 2003·109 cites·31 claims
- 0366US6382234B1One shot valve for operating down-hole well working and sub-sea devices and toolsWEATHERFORD LAMB·Filed 1997·Granted May 7, 2002·64 cites·15 claims
- 0438US2014124266A1Magnetically Initiated Actuation MechanismBIRCKHEAD JOHN M·Filed 2014·Application pending·0 cites
- 0537US2014043122A1Magnetically Initiated Actuation MechanismBIRCKHEAD JOHN M·Filed 2013·Application pending·0 cites
- 0622US6419011B1Annular shaped interrupted solenoid activator and pump for borehole subsea use (BEI-0002)BEI TECHNOLOGY·Filed 1998·Granted Jul 16, 2002·2 cites·18 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →