Inventor · disambiguated record
Derryl Schroeder
Also filed as: SCHROEDER DERRYL · SCHROEDER DERRYL G
4 granted patents·106 citations·filing 1990–2010
77Inventor score
Technology areasE21B
Top patents by PatentIndex Score
4 records- 0180US5411106AMethod and apparatus for acquiring and identifying multiple sidewall core samplesWESTERN ATLAS INT INC·Filed 1993·Granted May 2, 1995·84 cites·17 claims
- 0261US8539975B2Drill string valve and methodSCHROEDER DERRYL·Filed 2009·Granted Sep 24, 2013·9 cites·18 claims
- 0356US8727040B2Drill string valve and methodSCHROEDER DERRYL·Filed 2010·Granted May 20, 2014·2 cites·14 claims
- 0433US5101104ACarrier apparatus for radioactive well logging instrumentWESTERN ATLAS INT INC·Filed 1990·Granted Mar 31, 1992·11 cites·3 claims
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