Inventor

JOHNS DOUGLAS A

US5 patents

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

INTENT PATENT AG

2 patents

US5055747AOct 8, 1991

Self-regulating, no load protected electronic ballast system

INTENT PATENT AG47 citations90

US5130611AJul 14, 1992

Universal electronic ballast system

INTENT PATENT AG15 citations71

YORK TECHNOLOGIES INC

1 patent

US5576941ANov 19, 1996

Modular power supply system

YORK TECHNOLOGIES INC279 citations95

SCIENT INSTR INC

1 patent

US3979953ASep 14, 1976

Mass flow meter for cryogenic fluid

SCIENT INSTR INC27 citations76

AIRCO INC

1 patent

US4005603AFeb 1, 1977

Apparatus for measuring fluid flow

AIRCO INC21 citations74