Inventor

DAUGIRDAS KRISTUPAS

US3 patents

Patents

3 patents

US4882876ANov 28, 1989

Door operator with locking mechanism

VAPOR CORP48 citations88

US4087939AMay 9, 1978

Door operator with locking mechanism

VAPOR CORP52 citations85

US4134231AJan 16, 1979

Modulated output force door operator

VAPOR CORP27 citations74