Inventor · disambiguated record
Donald F. Hallden
Also filed as: HALLDEN DONALD F
5 granted patents·118 citations·filing 1979–2002
82Inventor score
Top patents by PatentIndex Score
5 records- 0187US4215746APressure responsive safety system for fluid linesWKM WELLHEAD SYSTEMS·Filed 1979·Granted Aug 5, 1980·66 cites·28 claims
- 0281US6918574B2Reduced torque gate valve with roller screwFMC TECHNOLOGIES·Filed 2002·Granted Jul 19, 2005·27 cites·15 claims
- 0357US5334268AMethod of producing high strength sucker rod couplingLTV ENERGY PROD CO·Filed 1992·Granted Aug 2, 1994·16 cites·9 claims
- 0435US5405461AMethod of producing high Strength sucker rod couplingCONTINENTAL EMSCO CO·Filed 1994·Granted Apr 11, 1995·7 cites·8 claims
- 0527US5405457AHigh strength sucker rod couplingCONTINENTAL EMSCO CO·Filed 1994·Granted Apr 11, 1995·2 cites·10 claims
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