Patents Represented by Law Firm Rosenberg, Klein & Belker
  • Safety door lock
    Patent number: 5890385
    Abstract: A safety door lock comprises follower member turned with an inside door knob or an outside door knob to move a latch bolt between the locking position and the unlocking position, and a clutch controlled by a push block between a first position where the outside door knob is coupled to the follower member and a second position where the outside door knob is disconnected from the follower member.
    Type: Grant
    Filed: February 12, 1998
    Date of Patent: April 6, 1999
    Inventor: Ming-Kun Lee