Patents by Inventor Charles Frederick Rose

Charles Frederick Rose 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).

  • Variable amplitude timed alarm system
    Patent number: 3931621
    Abstract: A timed alarm system having an audio signal source coupled to a sound reproducing system by means of a field effect transistor which yields increasing output as its control electrode is biased by a capacitive network thus producing an alarm signal of gradually increasing amplitude. Apparatus for delayed alarm and drowse capabilities is also described.
    Type: Grant
    Filed: December 10, 1973
    Date of Patent: January 6, 1976
    Assignee: RCA Corporation
    Inventor: Charles Frederick Rose