Inventor · disambiguated record
Frank R. Trowbridge
Also filed as: BRYAN WALTER B · TROWBRIDGE FRANK R
4 granted patents·149 citations·filing 1974–2008
80Inventor score
Top patents by PatentIndex Score
4 records- 0187US4793985AMethod of producing ultrafine ground calcium carbonateHUBER CORP J M·Filed 1984·Granted Dec 27, 1988·62 cites·8 claims
- 0286US7938707B1Methods for batch fabrication of cold cathode vacuum switch tubesSANDIA CORP·Filed 2008·Granted May 10, 2011·11 cites·16 claims
- 0386US4171166ADispersing apparatus with grooved impellerMOREHOUSE IND INC·Filed 1978·Granted Oct 16, 1979·56 cites·14 claims
- 0473US3961971AMethod for improving brightness of kaolinite clays including iron pyritesHUBER CORP J M·Filed 1974·Granted Jun 8, 1976·20 cites·5 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →