Patents by Inventor Frederic F. Kropf

Frederic F. Kropf 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: 4019605
    Abstract: In a food delivery system for restaurants, a conveyor tray adapted to receive a food container and to move along an overhead conveyor track from a central station along a loop including a series of delivery stations at patrons tables, an elevator including an elevator tray at each of the stations, trip mechanism at each station operable when actuated to remove the food container from the conveyor tray to the elevator tray at the station, the trip mechanisms being selectively actuated from a central location, mechanism operable by the reception of the food container on the elevator tray to lower said elevator tray to a position within reach of the patron, and to reset the trip mechanism, and mechanism operable by removal of the food container from the elevator tray to re-elevate the tray into operative relation with the conveyor.
    Type: Grant
    Filed: August 23, 1976
    Date of Patent: April 26, 1977
    Inventor: Frederic F. Kropf
  • Patent number: D352150
    Type: Grant
    Filed: July 30, 1993
    Date of Patent: November 1, 1994
    Inventor: Frederic F. Kropf