Taiwan Patent No. 168022
U.S. Patent No.6,341,513B1
Japan Patent No.3073644
Germany Patent No. NR20010136.6
China Patent No. ZL0023485.2 & ZL 01 3 01158.8 ?
Available for selecting electronic or mechanical combination number code.
Combined with key locks which lock mechanical & electronic combination locks or lock mechanical combination locks singly.
Visual (LED light) and sound signals.