Patents by Inventor Richard D. Greenblatt

Richard D. Greenblatt 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: 5136586
    Abstract: A method and apparatus for telephone line multiplex channeling of toll-quality voice and modem-encoded digital data from telecommunication devices (FAX, computers, displays, printers, etc.) involving variably sample-compression of digitally converted voice signals within successive time frames, and filling the resulting unoccupied time within each such frame with the modem-encoded digital data, and preferably with guard band signals separating the voice and modem-encoded digital data within each frame.
    Type: Grant
    Filed: December 4, 1989
    Date of Patent: August 4, 1992
    Assignee: Academy of Applied Science
    Inventor: Richard D. Greenblatt
  • Patent number: 5036513
    Abstract: A novel method of and apparatus for voice communication and transparent, non-interfering, automatic digital data exchange between appropriately equipped telephone terminals having cooperative digital signal processing and visual display equipment, using special recognition signal protocol triggering signals and providing modem capability for FAX, printer, microprocessor, answer machines and the like for providing extended services using in-band signalling sensible by users and machines. Such method is useful both with ordinary telephone exchanges and ISDN type exchanges.
    Type: Grant
    Filed: June 21, 1989
    Date of Patent: July 30, 1991
    Assignee: Academy of Applied Science
    Inventor: Richard D. Greenblatt