Inventor · disambiguated record
D. F. Walters
Also filed as: WALTERS D F
4 granted patents·83 citations·filing 1976–1985
79Inventor score
Files withDRESSER IND4
Top patents by PatentIndex Score
4 records- 0170US4073548ASealing system for a rotary rock bitDRESSER IND·Filed 1976·Granted Feb 14, 1978·25 cites·3 claims
- 0265US4183416ACutter actuated rock bit lubrication systemDRESSER IND·Filed 1978·Granted Jan 15, 1980·28 cites·3 claims
- 0357US4597455ARock bit lubrication systemDRESSER IND·Filed 1985·Granted Jul 1, 1986·21 cites·5 claims
- 0434US4330158ARotary rock bit with improved thrust flangeDRESSER IND·Filed 1980·Granted May 18, 1982·9 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →