Inventor

LANGHEINRICH HANS

DE2 patents

Patents

2 patents

US4492925AJan 8, 1985

Testing and evaluating circuit for proximity switches in machine control means

BALLUFF GEBHARD FEINMECH8 citations68

US4433309AFeb 21, 1984

Proximity switch with built-in test circuit

BALLUFF GEBHARD FEINMECH15 citations68