P

Inventor

FRISWELL DAVID R

16 patents
⚠️ This page may combine multiple inventors who share the name “FRISWELL DAVID R”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

ZYMARK CORP

6 patents
US5928952AJul 27, 1999

Scheduled system and method for processing chemical products

ZYMARK CORP141 citations95
US6068393AMay 30, 2000

Robotic system for processing chemical products

ZYMARK CORP81 citations94
US5100623AMar 31, 1992

Laboratory evaporation apparatus

ZYMARK CORP36 citations92
US5955373ASep 21, 1999

Environmentally controlled system for processing chemical products

ZYMARK CORP53 citations90
US4707452ANov 17, 1987

Laboratory evaporation

ZYMARK CORP20 citations82
US4600473AJul 15, 1986

Control of laboratory evaporation

ZYMARK CORP19 citations73

WATERS ASSOCIATES INC

4 patents
US4094641AJun 13, 1978

Low loss sample bottle assembly

WATERS ASSOCIATES INC59 citations96
US4094196AJun 13, 1978

Sample injection with automatic cleaning of sampling conduit

WATERS ASSOCIATES INC65 citations96
US4070004AJan 24, 1978

Diaphragm valve

WATERS ASSOCIATES INC44 citations92
US4094195AJun 13, 1978

Novel seal and apparatus including same

WATERS ASSOCIATES INC50 citations89

WATERS TECHNOLOGIES CORP

2 patents
US7955059B2Jun 7, 2011

Fluid control device for a high pressure analytical instrument

WATERS TECHNOLOGIES CORP2 citations61
US9657852B2May 23, 2017

Flow through isolation valve for high pressure fluids

WATERS TECHNOLOGIES CORP0 citations51

KEENE RUSSELL

2 patents
US8931519B2Jan 13, 2015

Pin valve assembly

KEENE RUSSELL2 citations60
US8539982B2Sep 24, 2013

Flow through isolation valve for high pressure fluid

KEENE RUSSELL2 citations60

FRISWELL DAVID R

1 patent
US4117727AOct 3, 1978

Bubble sensor and method

FRISWELL DAVID R39 citations89

CALIPER LIFE SCIENCES INC

1 patent
US6846680B2Jan 25, 2005

Liquid handling system with automatically interchangeable cannula array

CALIPER LIFE SCIENCES INC34 citations87