Inventor

WUETHRICH ALFRED

CH4 patents

Patents

4 patents

US4709152ANov 24, 1987

Infrared intrusion detector

CERBERUS AG37 citations92

US4847488AJul 11, 1989

Sabotage resistant light barrier wherein radiation is polarized into two opposite types of polarization

CERBERUS AG24 citations91

US4568924AFeb 4, 1986

Method of and apparatus for signalling an alarm

CERBERUS AG18 citations72

US4740701AApr 26, 1988

Infrared intrusion detector

CERBERUS AG18 citations71