Patents by Inventor Marilyn F. Hirsch

Marilyn F. Hirsch 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: 4777478
    Abstract: The present invention discloses an apparatus for monitoring persons, pets, things and the like including a monitored unit and a monitoring unit each having a transmitter and receiver. The monitored unit is adapted to transmit a periodic signal while the activities of the monitored object coincide with various threshold conditions. The monitored unit includes a plurality of indicators either visual or audio which inform the operator that the monitored unit has exceeded various threshold conditions. The monitoring unit includes a reset transmitter for actuating the monitored unit so that it produces either a continuous signal or a periodic signal. The monitoring unit further includes a homing mechanism automatically actuated upon receipt of either a continuous signal or an alarm signal by its receiver.
    Type: Grant
    Filed: May 6, 1987
    Date of Patent: October 11, 1988
    Assignees: Gordon S. Hirsch, Marilyn F. Hirsch
    Inventors: Gordon S. Hirsch, Marilyn F. Hirsch, Paul W. Hansen