P

Inventor

BESON JOHN

US15 patents
⚠️ This page may combine multiple inventors who share the name “BESON JOHN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

(unassigned)

4 patents
US5624101AApr 29, 1997

Dual seal valve

70 citations95
US5494256AFeb 27, 1996

Dual seal ball valve

37 citations92
US5445359AAug 29, 1995

Gate valve

44 citations92
US5542645AAug 6, 1996

Dual seal valve

16 citations73

FOSTER JAMES H

3 patents
US5094272AMar 10, 1992

Adjustable orifice plate seal

FOSTER JAMES H24 citations92
US5042531AAug 27, 1991

Energized seal for orifice plate

FOSTER JAMES H27 citations92
US5050842ASep 24, 1991

Valve seal strip orifice fitting

FOSTER JAMES H11 citations73

BESON JOHN

3 patents
US5338003AAug 16, 1994

Dual seal ball valve

BESON JOHN42 citations91
US4566671AJan 28, 1986

Gate valve having a secondary seal

BESON JOHN20 citations72
US4377273AMar 22, 1983

Gate valve having a secondary seal

BESON JOHN18 citations72

FOSTER OILFIELD EQUIPMENT COMP

2 patents
US5320327AJun 14, 1994

Gate valve

FOSTER OILFIELD EQUIPMENT COMP29 citations90
US4923171AMay 8, 1990

Gate valve having a secondary seal

FOSTER OILFIELD EQUIPMENT COMP11 citations71

BESON TECHNOLOGY INC

1 patent
US4569540AFeb 11, 1986

Piping suspender with metal-to-metal seal

BESON TECHNOLOGY INC53 citations93

MCEVOY OILFIELD EQUIPMENT CO

1 patent
US3965977AJun 29, 1976

Control line exiting coupling

MCEVOY OILFIELD EQUIPMENT CO40 citations92

FOSTER OILFIELD EQUIPMENT CO

1 patent
US5090661AFeb 25, 1992

Gate valve

FOSTER OILFIELD EQUIPMENT CO57 citations89