Patents by Inventor Peter Hakkel

Peter Hakkel 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: 4949075
    Abstract: A portable optical alarm system for area protection containing at least one light-emitting transmitter and a receiver sensing the emitted light is disclosed. The transmitters and receivers of the system form a chain in such a manner that the receiver sensing the light-impulses of the first transmitter is always connected electrically to the following transmitter and the last receiver of the system is connected electrically to the intervening organ and partly to the first transmitter of the system, or the first transmitter of the system is formed as a free-running unit. Transmitters and receivers can be arranged in an optical mutual arrangement where they are arranged in a casing containing the transmitter circuit and the associated battery along with the receiver circuit and the battery belonging thereto.
    Type: Grant
    Filed: July 13, 1988
    Date of Patent: August 14, 1990
    Assignees: Magyar Optikai Muvek, Komplex Kulkereskedelmi Vallalat
    Inventors: Laszlo Kurti, Peter Hakkel, Gyula Toth, Gyozo Vasziljevics