Inventor · disambiguated record
Donald V. Umphries
Also filed as: UMPHRIES DONALD V
4 granted patents·113 citations·filing 1990–1997
80Inventor score
Technology areasE21B
Files withDIRECTIONAL WIRELINE SERVICE I1DIRECTIONAL WIRELINE SERVICES1UMPHRIES DONALD V1WEATHERFORD US HOLDING L P A L1
Top patents by PatentIndex Score
4 records- 0161US5323684ADownhole charge carrierUMPHRIES DONALD V·Filed 1992·Granted Jun 28, 1994·44 cites·12 claims
- 0247US6014933ADownhole charge carrierWEATHERFORD US HOLDING L P A L·Filed 1997·Granted Jan 18, 2000·32 cites·17 claims
- 0339US5295544ADecentralized casing hole puncherDIRECTIONAL WIRELINE SERVICES·Filed 1992·Granted Mar 22, 1994·19 cites·21 claims
- 0437US5111885ADecentralized casing hole puncherDIRECTIONAL WIRELINE SERVICE I·Filed 1990·Granted May 12, 1992·18 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →