Patents by Inventor Sidney Fromberg

Sidney Fromberg 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).

  • Security door lock arrangement with magnetically operated switch in the closed door position
    Patent number: 5925861
    Abstract: A security lock for a door type structure in which a latch extends between the movable door and the fixed jamb. A magnet is contained within the latch and a switch is positioned in the jamb. The magnet passes into switch operating relationship to the switch for the condition of the door closed. When the magnet is moved out of the switch operating relationship to the switch, which occurs prior to the door being opened, the change in the magnetic flux causes the switch to generate an information signal which indicates that an attempt to open the particular door has been made.
    Type: Grant
    Filed: April 2, 1997
    Date of Patent: July 20, 1999
    Assignee: Sidney Fromberg
    Inventor: Sidney Fromberg