Inventor · disambiguated record
Frederick N. Trofimenkoff
Also filed as: MYRFIELD WARREN · TROFIMENKOFF FREDERICK N
10 granted patents·245 citations·filing 1978–2003
91Inventor score
Files withWEATHERFORD LAMB3TROFIMENKOFF FREDERICK N2TROFIMENKOFF ENGINEERING LTD1UNIVERSAL SKATE SHARPENER LTD1
Top patents by PatentIndex Score
10 records- 0190US4235050ASkate sharpening apparatusUNIVERSAL SKATE SHARPENER LTD·Filed 1978·Granted Nov 25, 1980·62 cites·16 claims
- 0279US6405795B2Subsurface signal transmitting apparatusWEATHERFORD LAMB·Filed 2001·Granted Jun 18, 2002·42 cites·8 claims
- 0374US6209632B1Subsurface signal transmitting apparatusFiled 1996·Granted Apr 3, 2001·56 cites·15 claims
- 0470US5909132AResistance bridge and its use in conversion systemsFiled 1997·Granted Jun 1, 1999·30 cites·5 claims
- 0558US6672383B2Subsurface signal transmitting apparatusWEATHERFORD LAMB·Filed 2002·Granted Jan 6, 2004·16 cites·7 claims
- 0645US5877637AResistance bridge and its use in conversion systemsFiled 1996·Granted Mar 2, 1999·11 cites·17 claims
- 0744US7093680B2Subsurface signal transmitting apparatusWEATHERFORD LAMB·Filed 2003·Granted Aug 22, 2006·5 cites·8 claims
- 0841US4827261AClock-controlled pulse width modulatorTROFIMENKOFF FREDERICK N·Filed 1987·Granted May 2, 1989·10 cites·8 claims
- 0933US4847620AClock-controlled voltage-to-frequency converterTROFIMENKOFF FREDERICK N·Filed 1987·Granted Jul 11, 1989·5 cites·6 claims
- 1030US4558301AVoltage-to-frequency and analog-to-digital converter circuitTROFIMENKOFF ENGINEERING LTD·Filed 1982·Granted Dec 10, 1985·8 cites·2 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →