Inventor · disambiguated record
Calvin E. Grubbs
Also filed as: GRUBBS CALVIN E
4 granted patents·158 citations·filing 1975–1987
80Inventor score
Top patents by PatentIndex Score
4 records- 0189US4723098AElectronic ballast circuit for fluorescent lampsTHOMAS INDUSTRIES INC·Filed 1987·Granted Feb 2, 1988·77 cites·19 claims
- 0284US4477748ASolid state ballastTHOMAS INDUSTRIES INC·Filed 1980·Granted Oct 16, 1984·56 cites·26 claims
- 0363US4042871AConversion system with overcurrent protection and start-up circuitryECC CORP·Filed 1975·Granted Aug 16, 1977·16 cites·10 claims
- 0447US4435749AHigh frequency inverter fault protection systemTHOMAS INDUSTRIES INC·Filed 1982·Granted Mar 6, 1984·9 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →