Inventor · disambiguated record
David R. Friswell
Also filed as: FRISWELL DAVID · FRISWELL DAVID R
16 granted patents·2 pending applications·647 citations·filing 1976–2013
95Inventor score
Files withZYMARK CORP6WATERS ASSOCIATES INC4WATERS TECHNOLOGIES CORP3KEENE RUSSELL2CALIPER LIFE SCIENCES INC1
Top patents by PatentIndex Score
18 records- 0193US4094196ASample injection with automatic cleaning of sampling conduitWATERS ASSOCIATES INC·Filed 1977·Granted Jun 13, 1978·65 cites·14 claims
- 0293US4094641ALow loss sample bottle assemblyWATERS ASSOCIATES INC·Filed 1977·Granted Jun 13, 1978·59 cites·9 claims
- 0389US4070004ADiaphragm valveWATERS ASSOCIATES INC·Filed 1976·Granted Jan 24, 1978·44 cites·13 claims
- 0487US5928952AScheduled system and method for processing chemical productsZYMARK CORP·Filed 1997·Granted Jul 27, 1999·141 cites·20 claims
- 0586US4094195ANovel seal and apparatus including sameWATERS ASSOCIATES INC·Filed 1977·Granted Jun 13, 1978·50 cites·6 claims
- 0683US6068393ARobotic system for processing chemical productsZYMARK CORP·Filed 1997·Granted May 30, 2000·81 cites·23 claims
- 0783US4117727ABubble sensor and methodFRISWELL DAVID R·Filed 1977·Granted Oct 3, 1978·39 cites·25 claims
- 0878US6846680B2Liquid handling system with automatically interchangeable cannula arrayCALIPER LIFE SCIENCES INC·Filed 2001·Granted Jan 25, 2005·34 cites·36 claims
- 0978US5955373AEnvironmentally controlled system for processing chemical productsZYMARK CORP·Filed 1997·Granted Sep 21, 1999·53 cites·23 claims
- 1076US5100623ALaboratory evaporation apparatusZYMARK CORP·Filed 1989·Granted Mar 31, 1992·36 cites·14 claims
- 1167US4707452ALaboratory evaporationZYMARK CORP·Filed 1984·Granted Nov 17, 1987·20 cites·6 claims
- 1265US8931519B2Pin valve assemblyKEENE RUSSELL·Filed 2005·Granted Jan 13, 2015·2 cites·21 claims
- 1361US7955059B2Fluid control device for a high pressure analytical instrumentWATERS TECHNOLOGIES CORP·Filed 2005·Granted Jun 7, 2011·2 cites·11 claims
- 1461US4600473AControl of laboratory evaporationZYMARK CORP·Filed 1984·Granted Jul 15, 1986·19 cites·10 claims
- 1558US8539982B2Flow through isolation valve for high pressure fluidKEENE RUSSELL·Filed 2005·Granted Sep 24, 2013·2 cites·14 claims
- 1653US9657852B2Flow through isolation valve for high pressure fluidsWATERS TECHNOLOGIES CORP·Filed 2013·Granted May 23, 2017·0 cites·9 claims
- 1751US2013076029A1Gasket and Seal ApparatusWATERS TECHNOLOGIES CORP·Filed 2012·Application pending·0 cites
- 1848US2008099070A1Gasket and Seal ApparatusWATERS INVESTMENTS LTD·Filed 2005·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →