Inventor

STEFANEK RONALD T

US3 patents

Patents

3 patents

US4593543AJun 10, 1986

Security lock

FOLGER ADAM CO63 citations91

US5079936AJan 14, 1992

High security cylinder lock

FOLGER ADAM CO49 citations88

US4797779AJan 10, 1989

Pulsed power supply

FOLGER ADAM CO16 citations68