Inventor · disambiguated record
Charles H. Keith
Also filed as: KEITH CHARLES H · KEITH CHARLES HERBERT · LEVERS WILLIAM E
16 granted patents·895 citations·filing 1974–2008
96Inventor score
Top patents by PatentIndex Score
16 records- 0194US3931824ASmoking materialsCELANESE CORP·Filed 1975·Granted Jan 13, 1976·225 cites·19 claims
- 0293US4460647AFibrets suitable for paper opacificationCELANESE CORP·Filed 1982·Granted Jul 17, 1984·50 cites·6 claims
- 0393US4274914AFilter materialCELANESE CORP·Filed 1979·Granted Jun 23, 1981·105 cites·9 claims
- 0491US4192838AProcess for producing filter materialCELANESE CORP·Filed 1978·Granted Mar 11, 1980·38 cites·4 claims
- 0591US4047862ACellulose ester fibrillar structureCELANESE CORP·Filed 1975·Granted Sep 13, 1977·59 cites·5 claims
- 0689US4233993ASmoking materialCELANESE CORP·Filed 1978·Granted Nov 18, 1980·85 cites·10 claims
- 0788US4197861ASmoking materialCELANESE CORP·Filed 1975·Granted Apr 15, 1980·68 cites·7 claims
- 0887US4283186AMethod of forming cigarette filter materialCELANESE CORP·Filed 1978·Granted Aug 11, 1981·27 cites·3 claims
- 0983US4007745AFilterCELANESE CORP·Filed 1974·Granted Feb 15, 1977·41 cites·2 claims
- 1082US4189511AFilterCELANESE CORP·Filed 1977·Granted Feb 19, 1980·31 cites·3 claims
- 1181US4319591ASmoking compositionsCELANESE CORP·Filed 1978·Granted Mar 16, 1982·56 cites·10 claims
- 1268US4469112ACompound filterCELANESE CORP·Filed 1982·Granted Sep 4, 1984·31 cites·7 claims
- 1367US4460001AProcess for preparing compound filterCELANESE CORP·Filed 1982·Granted Jul 17, 1984·30 cites·3 claims
- 1463US4617946ATobacco smoke mouthpiece and method of making sameBROWN & WILLIAMSON TOBACCO CORP·Filed 1984·Granted Oct 21, 1986·23 cites·10 claims
- 1560US4655736AMethod of manufacturing a tobacco smoke filterBROWN & WILLIAMSON TOBACCO CORP·Filed 1984·Granted Apr 7, 1987·21 cites·5 claims
- 1655US8265360B2Methods and systems for analyzing ratiometric dataSORNBORGER ANDREW T·Filed 2008·Granted Sep 11, 2012·5 cites·43 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →