Patents by Inventor Milton D. Grill

Milton D. Grill 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).

  • Patent number: 4506527
    Abstract: This door lock assembly has a thin mounting plate which fits snugly against the door post and passes behind the rear edge of the door without interfering with the usual latch on the door. An opening in this mounting plate passes the usual striker on the door post for engagement by the door latch. The mounting plate has an outer wall segment which extends behind the rear edge of the door and supports the housing of a lock. The lock has a slidable locking bolt which can be retracted behind the rear edge of the door, permitting the door to be opened and closed, or extended forward along the outside of the door to lock it closed.
    Type: Grant
    Filed: April 4, 1983
    Date of Patent: March 26, 1985
    Inventor: Milton D. Grill