Patents by Inventor Thomas Joseph Walczak

Thomas Joseph Walczak 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).

  • Method and radio frequency identification system for a novel protocol for reliable communication
    Patent number: 5818348
    Abstract: Reliable communication is provided by a radio frequency identification system comprising at least one of an interrogator (102) and a transponder (104). The interrogator (102) transmits a plurality of interrogator frames (106) and receives at least one of a plurality of transponder frames (114). The transponder (104) transmits the plurality of transponder frames (114) and receives at least one of the plurality of interrogator frames (106). Each frame in the plurality of interrogator frames and the plurality of transponder frames includes an initialization sequence (108 and 116), at least one information sequence of a first predetermined length (110 and 118), and a check sequence of a second predetermined length (112 and 120) for each information sequence.
    Type: Grant
    Filed: July 23, 1997
    Date of Patent: October 6, 1998
    Assignee: Motorola, Inc.
    Inventors: Thomas Joseph Walczak, Donald Bernard Lemersal, Jr.