Patents Assigned to Dsung Precision Company
  • Electronic lock and key
    Patent number: 4697171
    Abstract: An electronic lock and key includes an electronic key which produces a specific electric signal such as a frequency signal, photo signal or logic signal when inserted into the key holder of the lock; and an electronic lock which is comprised of a power source, a key holder, a lock signal generator, and a signal comparing circuit that compares the signal of said key and the signal of said lock signal generator.
    Type: Grant
    Filed: January 27, 1986
    Date of Patent: September 29, 1987
    Assignee: Dsung Precision Company
    Inventor: Kyung S. Suh