Inventor · disambiguated record
Julian D. Keithahn
Also filed as: KEITHAHN JULIAN D
4 granted patents·283 citations·filing 1980–1985
81Inventor score
Files withHYDRIL CO4
Top patents by PatentIndex Score
4 records- 0195US4444250AFlow diverterHYDRIL CO·Filed 1982·Granted Apr 24, 1984·188 cites·5 claims
- 0288US4635678AFlow control apparatusHYDRIL CO·Filed 1985·Granted Jan 13, 1987·63 cites·13 claims
- 0348US4605195AAnnular blowout preventer packing unitHYDRIL CO·Filed 1985·Granted Aug 12, 1986·20 cites·15 claims
- 0443US4342330ABall type valve having improved redundant sealing systemHYDRIL CO·Filed 1980·Granted Aug 3, 1982·12 cites·2 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →