Inventor · disambiguated record
Karl N. Tunstall
Also filed as: TUNSTALL KARL N
4 granted patents·88 citations·filing 1976–1982
78Inventor score
Files withOTIS ENG CO4
Top patents by PatentIndex Score
4 records- 0173US4199131AActuator module for wireline cutting safety valveOTIS ENG CO·Filed 1977·Granted Apr 22, 1980·42 cites·3 claims
- 0264US4274432AValveOTIS ENG CO·Filed 1980·Granted Jun 23, 1981·25 cites·6 claims
- 0343US4087073ASafety valve with a hydraulic actuatorOTIS ENG CO·Filed 1976·Granted May 2, 1978·13 cites·6 claims
- 0433US4420042AMethod for cutting and replacing tubing without killing wellOTIS ENG CO·Filed 1982·Granted Dec 13, 1983·8 cites·3 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →