Patents by Inventor William D. Mayo

William D. Mayo 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: 4072973
    Abstract: A camera signal system for portrait taking in which a sensory signal alerts animate subjects of photography, such as group-portraiture subjects, at a predeterminable time before exposure, usually from one to three seconds. The signal is preferably both audible, as a "beep", and visual, as a "funny face" which appears when lighted from behind, for relaxing and at the same time immobilizing the subjects. Both human-timed and adjustable-time and non-adjustable time automatically-timed embodiments are provided in clip-on, clamp-on, glue-on, screw-on, fabric attached and built-in versions, adapted for employment with a variety of cameras.
    Type: Grant
    Filed: January 26, 1976
    Date of Patent: February 7, 1978
    Inventor: William D. Mayo