Patents by Inventor Martin Waldman

Martin Waldman 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).

  • Aquarium or terrarium vessel
    Patent number: 5090358
    Abstract: An aquarium or terrarium includes a relatively small, lightweight integrated picture vessel intended for simple display on a vertical or horizontal surface. An open top picture reservoir has an arrangement for a removable background picture scene. Mounting means and holding means secures the picture removeability. The reservoir can be mass producible via injection molding. Typical sizes include postcard and standard photograph dimensions.
    Type: Grant
    Filed: September 4, 1990
    Date of Patent: February 25, 1992
    Inventor: Martin Waldman
  • Alarm system for three-element windows
    Patent number: 3943485
    Abstract: An alarm system is constructed to energize when the bottom window or the top window of a three-element window assembly is opened, so long as the third element (usually a screen) is not in its closed position in front of the window being opened or if the third element is removed from its mounting slides.The switching functions are performed by magnetic reed switches imbedded in the window frame and responsive to permanent magnets in the peripheral frame of the respective elements.
    Type: Grant
    Filed: May 1, 1975
    Date of Patent: March 9, 1976
    Assignee: Marjo Systems, Inc.
    Inventor: Martin Waldman