Patents by Inventor Raymond Lenoir

Raymond Lenoir 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).

  • Data integrity securing means
    Patent number: 5046069
    Abstract: A process for updating the frame check sequence FCS.sub.r (X) of a digital frame including an embedded variable header polynomial H.sub.r (x), said process including: partitioning H.sub.r (x); XORing the modified polynomial header H.sub.t (x) and previous polynomial header H.sub.r (x) to generate a differential polynomial D(x); computing a differential frame check polynomial sequence dFCS (x) on said D(x) only and adding dFCS (x) to the polynomial FCS.sub.r (x) to form a new FCS.sub.t (x).
    Type: Grant
    Filed: October 17, 1988
    Date of Patent: September 3, 1991
    Assignee: International Business Machines Corporation
    Inventors: Jean Calvignac, Michel Dauphin, Raymond Lenoir, Jean-Louis Picard
  • Data validity checking means
    Patent number: 4964127
    Abstract: A data handling system wherein data are arranged into frames including an information data section and a frame check sequence (FCS) section, and wherein a stamp section has to be appended/deleted from said frame. The stamp appending is operated without any FCS updating being required by appending to each stamp, a so called precomputed and stored anti-stamp.
    Type: Grant
    Filed: November 3, 1988
    Date of Patent: October 16, 1990
    Assignee: International Business Machines Corporation
    Inventors: Jean Calvignac, Michel Dauphin, Raymond Lenoir, Jean-Louis Picard