Inventor

BILLOWS MITCHELL J

3 patents

Patents

3 patents

US4257285AMar 24, 1981

Roller door operating mechanism

BYRNE & DAVIDSON DOORS21 citations78

US4844140AJul 4, 1989

Releasable drive assembly

BYRNE & DAVIDSON DOORS16 citations71

US4782887ANov 8, 1988

Rolling door drive assembly

BYRNE & DAVIDSON DOORS9 citations71