A locker lock fits a standard locker door three-hole door prep, with all electronics contained in a single housing mounted on the front of the locker door and a latch device behind the locker door. The locker lock preferably includes a keypad to allow rotation of a handle or knob, and also includes a...http://www.google.com.au/patents/US20090308115?utm_source=gb-gplus-sharePatent US20090308115 - Electronic locker lock
