Inventor · disambiguated record
Donald D. Drummond
Also filed as: DRUMMOND DONALD D
5 granted patents·112 citations·filing 1982–1987
82Inventor score
Technology areasE21B
Top patents by PatentIndex Score
5 records- 0178US4540055ADrill bit assembly having improved operational lifeDRUMCO·Filed 1983·Granted Sep 10, 1985·56 cites·9 claims
- 0249US4508183AMethod and apparatus for lubricating a drill bitDRUMCO·Filed 1983·Granted Apr 2, 1985·18 cites·18 claims
- 0347US4515229ADrill bit assembly with fluid separatorDRUMMOND DONALD D·Filed 1983·Granted May 7, 1985·20 cites·15 claims
- 0434US4805709ADrill bit and drill assemblyDRUMCO·Filed 1987·Granted Feb 21, 1989·10 cites·10 claims
- 0534US4541494ADrill bit assemblyDRUMCO·Filed 1982·Granted Sep 17, 1985·8 cites·29 claims
Join the waitlist — get patent alerts
Get an alert when Donald D. Drummond files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →