Patents by Inventor Michael L. Rubinstein

Michael L. Rubinstein 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).

  • High speed half duplex modem with fast turnaround protocol
    Patent number: 4894847
    Abstract: A modem with improved signal processing and handshaking capabilities as described. Two digital signal processors are used to perform independent, concurrent operations so that a faster execution rate is obtained and more precise calculations are made possible. The modem also uses an improved handshaking technique which allows the modem to maintain compatibility with existing 1200 and 2400 bps modems while allowing for negotiation for 4800 and 9600 bps communications. The modem also incorporates an improved baud clock recovery circuit which dynamically adjusts the actual sampling point in a manner dependent upon the difference between the actual sampling point and the optimal sampling point. This allows the actual sampling point to converge upon the desired sampling point at a high rate while minimizing jitter around the optimal sampling point.
    Type: Grant
    Filed: May 26, 1987
    Date of Patent: January 16, 1990
    Assignee: Hayes Microcomputer Products, Inc.
    Inventors: Taruna Tjahjadi, German E. Correa, Matthew F. Easley, John N. Martin, Charles H. McCorvey, Jr., Randy D. Nash, Cynthia A. Panella, Michael L. Rubinstein, Martin H. Sauser, Jr., David F. Strawn, George R. Thomas