Patents by Inventor Henry Robert Goldenberg

Henry Robert Goldenberg 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).

  • Dual speed full duplex data transmission
    Patent number: 4069392
    Abstract: A dual-speed, dual format full-duplex two-wire voiceband data transmission system provides automatic speed selection at the answering terminal responsive to a handshaking sequence which is compatible with existing systems operating at telegraph speeds. Existing systems provide asynchronous full-duplex serial data transmission in the speed range of zero to 300 bits per second using frequency-shift keying of tones in split frequency bands dedicated to the respective transmisson directions. Alternative full-duplex serial data transmission at 1200 bits per second using phase-shift keying of carrier waves in these same split frequency bands can now be provided from a common line protocol.
    Type: Grant
    Filed: November 1, 1976
    Date of Patent: January 17, 1978
    Assignee: Incorporated Bell Telephone Laboratories
    Inventors: Henry Robert Goldenberg, Richard John Peck, Shih Yung Tong, David Allen Webb