Patents by Inventor Donald V. Z. Wadsworth

Donald V. Z. Wadsworth 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: 4975948
    Abstract: A printed telephone number in either numerical (OCR-readable) or standard bar code format can be dialed rapidly and accurately by scanning the number with a hand-held optical sensor or wand. The OCR or bar code wand output is connected to an automatic dialing apparatus that includes a processor, signal generator, and interface circuit. The processor decodes the wand output and translates the call number digits into digital control signals. The control signals drive a signal generator that outputs the call number address digits in the form of tone bursts, typically DTMF tones. The signal generator output is coupled either electrically or accoustically to the microphone input of a telephone set speech circuit. The telephone set then transmits the tone signals over the telephone line. No modification of the telephone set is required since the automatic dialing apparatus, including the hand-held wand, interfaces with the telephone set using either existing modular connectors or acoustic coupling.
    Type: Grant
    Filed: October 13, 1989
    Date of Patent: December 4, 1990
    Inventors: Dennis R. Andresen, Jeffrey R. Cohen, Donald V. Z. Wadsworth