Inventor · disambiguated record
Dagobert Feld
Also filed as: FELD DAGOBERT
6 granted patents·265 citations·filing 1988–2003
87Inventor score
Technology areasE21B
Files withBAKER HUGHES INC3DMT GES FUR FORSCHUNG UND PRUF1EASTMAN CHRISTENSEN CO1NOBLE DRILLING SERVICES INC1
Top patents by PatentIndex Score
6 records- 0188US5168941ADrilling tool for sinking wells in underground rock formationsBAKER HUGHES INC·Filed 1991·Granted Dec 8, 1992·120 cites·32 claims
- 0272US4901290AApparatus for the generation of pressure pulses in drilling mud compositionsEASTMAN CHRISTENSEN CO·Filed 1988·Granted Feb 13, 1990·45 cites·11 claims
- 0365US5040155ADouble guided mud pulse valveBAKER HUGHES INC·Filed 1990·Granted Aug 13, 1991·45 cites·15 claims
- 0451US6845826B1Saver sub for a steering toolNOBLE DRILLING SERVICES INC·Filed 2003·Granted Jan 25, 2005·20 cites·19 claims
- 0540US5156222ADirectional drilling tool apparatus and methodBAKER HUGHES INC·Filed 1990·Granted Oct 20, 1992·16 cites·12 claims
- 0636US5806612AApparatus for the transmission of information in a drill stringDMT GES FUR FORSCHUNG UND PRUF·Filed 1997·Granted Sep 15, 1998·19 cites·12 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →