Inventor

FIRTH DONALD

9 patents

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

STAMET INC

2 patents

US5051041ASep 24, 1991

Multiple-choke apparatus for transporting and metering particulate material

STAMET INC82 citations94

US4988239AJan 29, 1991

Multiple-choke apparatus for transporting and metering particulate material

STAMET INC85 citations94

SECRETARY INDUSTRY BRIT

2 patents

US4200052AApr 29, 1980

Systems for controlling the position of a moored floating vessel

SECRETARY INDUSTRY BRIT39 citations89

US4180171ADec 25, 1979

Cranes

SECRETARY INDUSTRY BRIT22 citations78

TOSCO CORP

2 patents

US4361333ANov 30, 1982

Retort seal mechanism with integral bearings

TOSCO CORP14 citations72

US4353558AOct 12, 1982

Hydrostatic retort seal

TOSCO CORP4 citations61

FIRTH DONALD

1 patent

US4516674AMay 14, 1985

Method and apparatus for conveying and metering solid material

FIRTH DONALD85 citations92

SECRETARY TRADE IND BRIT

1 patent

US3971217AJul 27, 1976

Reciprocatable devices

SECRETARY TRADE IND BRIT7 citations68

NAT RES DEV

1 patent

US4048906ASep 20, 1977

Low-stress cam-driven piston machines

NAT RES DEV6 citations60