Patents by Inventor David I. Klein

David I. Klein 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: 4294035
    Abstract: An amusement device (10) to produce an audio output from an audio transducer (76), as well as a visual output from a plurality of light emitting diode elements (68, 70, 72, 74). The light emitting diode elements (68, 70, 72, 74) are intermittently lighted in accordance with a predetermined first frequency determined by a first photoresistor element (52). The first photoresistor element (52) includes a circuit coupled to a first oscillator circuit (20) which determines the first predetermined frequency of the visual output system (66) responsive to the amount of photons impinging on first photoresistor element (52). Correspondingly, a second predetermined frequency for audio transducer (76) is determined by second photoresistor element (82) which is coupled to a second oscillator circuit (22) for producing the predetermined second frequency.
    Type: Grant
    Filed: March 21, 1980
    Date of Patent: October 13, 1981
    Assignee: George Eng
    Inventor: David I. Klein