Inventor · disambiguated record
Vaughn R. Johnston
Also filed as: JOHNSTON VAUGHN R
5 granted patents·245 citations·filing 1983–2006
84Inventor score
Technology areasE21B
Top patents by PatentIndex Score
5 records- 0188US4486025AStripper packerWASHINGTON ROTATING CONTROL HE·Filed 1984·Granted Dec 4, 1984·99 cites·8 claims
- 0283US7392860B2Stripper rubber on a steel core with an integral sealing gasketJOHNSTON VAUGHN R·Filed 2006·Granted Jul 1, 2008·30 cites·8 claims
- 0378US4531591ADrilling head method and apparatusWASHINGTON ROTATING CONTROL HE·Filed 1983·Granted Jul 30, 1985·57 cites·17 claims
- 0474US4955436ASeal apparatusJOHNSTON VAUGHN R·Filed 1989·Granted Sep 11, 1990·53 cites·10 claims
- 0529US4889196ADiverter apparatusJOHNSTON VAUGHN R·Filed 1988·Granted Dec 26, 1989·6 cites·17 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →