Inventor · disambiguated record
Oscar Kaalstad
Also filed as: KAALSTAD OSCAR · KAALSTAD OSCAR W
5 granted patents·171 citations·filing 1982–1991
84Inventor score
Technology areasE21B
Top patents by PatentIndex Score
5 records- 0170US5064007AThree disc drill bitNORVIC SA·Filed 1990·Granted Nov 12, 1991·60 cites·24 claims
- 0267US4549614ADrilling deviceENGTECH SA·Filed 1982·Granted Oct 29, 1985·38 cites·27 claims
- 0365US4832143ARotary drilling deviceCLEDISC INT BV·Filed 1988·Granted May 23, 1989·33 cites·21 claims
- 0451US5147000ADisc drill bitNORVIC SA·Filed 1991·Granted Sep 15, 1992·29 cites·28 claims
- 0538US4790397ARotary drilling deviceCLEDISC INT BV·Filed 1987·Granted Dec 13, 1988·11 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →