Inventor

LAINHART GREGORY C

US4 patents

Patents

4 patents

US5647235AJul 15, 1997

Tamper-evident electronic combination lock having integral bearing/retaining member

SARGENT & GREENLEAF32 citations94

US4776187AOct 11, 1988

Changeable key cylinder exposed shackle padlock

SARGENT & GREENLEAF49 citations90

US4763496AAug 16, 1988

High security changeable key cylinder type shackle padlock

SARGENT & GREENLEAF31 citations90

US5095724AMar 17, 1992

Tumbler wheel scrambler for combination lock

SARGENT & GREENLEAF8 citations70