Patents by Inventor John E. Frederiksen

John E. Frederiksen 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).

  • Electronic timepiece
    Patent number: 4114362
    Abstract: An electronic timepiece includes circuit means by which the date counter thereof is automatically set to 28 days for February, and alternately, simply settable to 29 days for February occurring during a leap year.
    Type: Grant
    Filed: March 14, 1977
    Date of Patent: September 19, 1978
    Assignee: Texas Instruments Incorporated
    Inventor: John E. Frederiksen