Patents by Inventor Ronald E. Maizland

Ronald E. Maizland 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).

  • Intrusion alarm
    Patent number: 4340884
    Abstract: An intrusion alarm comprised of a retractible cord having a releasable member attached to one end of the cord. The releasable member can be held at one side of an entry way such as a door way, holding the cord extended. A retractor mounted at the other side of the entry way so as to retract the cord when the releasable member is released, such as by the opening of a door. The alarm includes a power source and a signal, these being operatively connected to sound an alarm when the releasable member is released. The releasable member may be such as a magnet, and it can also be used as a switch to connect the power supply to the signal.
    Type: Grant
    Filed: May 22, 1980
    Date of Patent: July 20, 1982
    Inventor: Ronald E. Maizland