Inventor · disambiguated record
Bobby J. Hallmark
Also filed as: HALLMARK BOBBY J
11 granted patents·362 citations·filing 1976–1990
92Inventor score
Technology areasE21B
Top patents by PatentIndex Score
11 records- 0191US4339948AWell formation test-treat-test apparatus and methodGEARHART IND INC·Filed 1980·Granted Jul 20, 1982·100 cites·10 claims
- 0281US4950844AMethod and apparatus for obtaining a core sample at ambient pressureHALLIBURTON LOGGING SERVICES·Filed 1989·Granted Aug 21, 1990·63 cites·23 claims
- 0371US4246782ATool for testing earth formations in boreholesGEARHART OWEN INDUSTRIES·Filed 1980·Granted Jan 27, 1981·40 cites·3 claims
- 0467US4369654ASelective earth formation testing through well casingHALLMARK BOBBY J·Filed 1980·Granted Jan 25, 1983·37 cites·20 claims
- 0560US4292842ATool for testing earth formations in boreholesGEARHART IND INC·Filed 1980·Granted Oct 6, 1981·26 cites·2 claims
- 0659US4302881ACalibrated conduit caliper and methodGEARHART IND INC·Filed 1980·Granted Dec 1, 1981·30 cites·9 claims
- 0758US4270385ATool for testing earth formations in boreholesGEARHART OWEN INDUSTRIES·Filed 1979·Granted Jun 2, 1981·21 cites·5 claims
- 0851US4164886ASealing projectileGEARHART OWEN INDUSTRIES·Filed 1977·Granted Aug 21, 1979·16 cites·4 claims
- 0948US4248081ATool for testing earth formations in boreholesGEARHART OWEN INDUSTRIES·Filed 1980·Granted Feb 3, 1981·16 cites·3 claims
- 1032US5043948ABorehole televiewer systemHALLIBURTON LOGGING SERVICES·Filed 1990·Granted Aug 27, 1991·9 cites·17 claims
- 1132US4089381AChamber isolator and sealing means for borehole perforating toolsGEARHART OWEN INDUSTRIES·Filed 1976·Granted May 16, 1978·4 cites·15 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →