Patents by Inventor Justin J. Monahan

Justin J. Monahan 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).

  • Combined audible signal and communicator
    Patent number: D273848
    Type: Grant
    Filed: April 24, 1981
    Date of Patent: May 15, 1984
    Inventor: Justin J. Monahan
  • Intercom
    Patent number: D274517
    Type: Grant
    Filed: April 24, 1981
    Date of Patent: July 3, 1984
    Inventor: Justin J. Monahan