Inventor · disambiguated record
Norman R. Preston
Also filed as: PRESTON NORMAN R
4 granted patents·69 citations·filing 1975–1988
76Inventor score
Top patents by PatentIndex Score
4 records- 0183US4032997AFlush toilet accessoryPHRIPP CLARENCE F·Filed 1975·Granted Jul 5, 1977·42 cites·7 claims
- 0251US4134165AFlush toilet accessoryPHRIPP CLARENCE F·Filed 1978·Granted Jan 16, 1979·15 cites·9 claims
- 0341US4120056AFlush toilet accessoryPHRIPP CLARENCE F·Filed 1977·Granted Oct 17, 1978·11 cites·9 claims
- 0419US4821766AToilet tank fill valvePRESTON NORMAN R·Filed 1988·Granted Apr 18, 1989·1 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →