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Inventor

COLLIER DONALD W

US5 patents
⚠️ This page may combine multiple inventors who share the name “COLLIER DONALD W”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

GUARDIAN TECH INC

3 patents
US4843377AJun 27, 1989

Remote confinement system

GUARDIAN TECH INC271 citations97
US4738333AApr 19, 1988

Sobriety interlock with unsupervised confirmation of operator identity

GUARDIAN TECH INC135 citations96
US4999613AMar 12, 1991

Remote confinement system

GUARDIAN TECH INC215 citations95

GUARDIAN INTERLOCK SYSTEMS INC

1 patent
US4697666AOct 6, 1987

Sobriety interlock with time-locked interlock mode

GUARDIAN INTERLOCK SYSTEMS INC57 citations92

COLLIER DONALD W

1 patent
US4093945AJun 6, 1978

Breath testing system

COLLIER DONALD W104 citations92