Patents by Inventor Fred J. Kramer

Fred J. Kramer 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).

  • Simulated engine with sound generator
    Patent number: 5314372
    Abstract: A battery and generator operated electro-mechanical device looks like an engine and emits engine sounds. The engine attaches to a bicycle frame giving the bicycle the appearance of being a motor bike. The engine makes an authentic idle sound when first started up and sounds like an engine accelerating to full throttle as the bike is pedalled. In a second embodiment, a fully mechanical engine sound is produced whenever the bike is in motion. Both embodiments are housed in an authentic looking engine housing.
    Type: Grant
    Filed: April 12, 1993
    Date of Patent: May 24, 1994
    Inventor: Fred J. Kramer