Inventor

MERICAL DENNIS G

US3 patents

Patents

3 patents

US4756333AJul 12, 1988

Vacuum check valve

GEN MOTORS CORP2 citations57

US4724867AFeb 16, 1988

Vacuum check valve

GEN MOTORS CORP6 citations57

US4856554AAug 15, 1989

Vacuum check valve and method of control

GEN MOTORS CORP1 citations45