Patents by Inventor John B. Havener

John B. Havener 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).

  • Telephone answering instrument
    Patent number: D321348
    Type: Grant
    Filed: September 14, 1990
    Date of Patent: November 5, 1991
    Assignee: AT&T Bell Laboratories
    Inventors: Daniel K. Harden, John B. Havener