Patents by Inventor Leo Coopersmith

Leo Coopersmith 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).

  • Door chain lock and release system
    Patent number: 4054310
    Abstract: A door security and release system wherein a door safety chain or similar linkage is tautly held in door securing condition against any efforts to release it from outside the door, with release means associated with the inside door operating member and adapted to be actuated by turning the door operating member.
    Type: Grant
    Filed: October 6, 1975
    Date of Patent: October 18, 1977
    Assignee: Leigh Products, Inc.
    Inventor: Leo Coopersmith