Inventor

RANDALL CYRIL A

4 patents

Patents

4 patents

US4284097AAug 18, 1981

In line back flow preventer

AMTROL INC126 citations94

US4232704ANov 11, 1980

In line back flow preventer

AMTROL INC73 citations91

US4420010ADec 13, 1983

In-line back flow preventer

AMTROL INC14 citations71

US4207915AJun 17, 1980

Back flow preventer

AMTROL INC17 citations71