Inventor · disambiguated record
John M. Spence
Also filed as: SPENCE JOHN M · TORODE ALLAN J
4 granted patents·141 citations·filing 1978–1994
80Inventor score
Top patents by PatentIndex Score
4 records- 0192US4912009AToner composition and method of makingEASTMAN KODAK CO·Filed 1988·Granted Mar 27, 1990·54 cites·19 claims
- 0278US4814250AElectrophotographic toner and developer compositions containing dioctylsulfosuccinate and sodium benzoate charge control agentsEASTMAN KODAK CO·Filed 1987·Granted Mar 21, 1989·58 cites·17 claims
- 0369US4209513ATablet formulationBURROUGHS WELLCOME CO·Filed 1978·Granted Jun 24, 1980·25 cites·3 claims
- 0437US5480757ATwo component electrophotographic developers and preparation methodEASTMAN KODAK CO·Filed 1994·Granted Jan 2, 1996·4 cites·20 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →