Patents by Inventor Fred N. Schwend

Fred N. Schwend has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Combination door lock
    Patent number: 4838057
    Abstract: A combination lock to be fitted in a door having standard size lock and bolt bores therein. A series of code pins extend through the lock bore and are movable between set and reset positions from both sides of the door to permit rotation of an exterior knob spindle to release the lock. An interior knob may be rotated to release the lock even though locked from the exterior. An adjustment feature selectively adjusts the lock to act as either a single lock or a double lock.
    Type: Grant
    Filed: February 29, 1988
    Date of Patent: June 13, 1989
    Assignee: Francis R. Schwend
    Inventor: Fred N. Schwend