Inventor · disambiguated record
Louis H. Barnard
Also filed as: BARNARD LOUIS H
4 granted patents·109 citations·filing 1978–1990
79Inventor score
Files withHUGHES TOOL CO4
Top patents by PatentIndex Score
4 records- 0188US5038640ATitanium carbide modified hardfacing for use on bearing surfaces of earth boring bitsHUGHES TOOL CO·Filed 1990·Granted Aug 13, 1991·59 cites·8 claims
- 0267US4775016ADownhole pressure fluctuating feedback systemHUGHES TOOL CO·Filed 1987·Granted Oct 4, 1988·26 cites·8 claims
- 0354US4256187AImpact tool with hydraulic cocking mechanismHUGHES TOOL CO·Filed 1978·Granted Mar 17, 1981·13 cites·16 claims
- 0442US4661932ADynamic downhole recorderHUGHES TOOL CO·Filed 1983·Granted Apr 28, 1987·11 cites·2 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →