Patent ID: 7571627

Claim:
A padlock comprising: a lock body comprising a first lock hole and a second lock hole separate from the first lock hole; a key-operable locking unit disposed in the lock body and configured to be operated by a key; a combination locking unit disposed in the lock body and configured to be operated via a code; and a shackle comprising a first end for insertion in the first lock hole and a second end for insertion in the second lock hole; wherein the first end of the shackle is controlled by the key-operable locking unit to be locked in or released for withdrawal from the first lock hole of the lock body and is independent of the combination locking unit; and the second end of the shackle is controlled by the combination locking unit to be locked in or released for withdrawal from the second lock hole of the lock body and is independent of the key-operable locking unit.