Patents by Inventor Carl Masami Uyehara

Carl Masami Uyehara 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).

  • Signature field in a latency measurement frame
    Patent number: 7594159
    Abstract: Information is added to an encapsulated payload in a data field of a frame subsequently to placing a checksum into a checksum field of a header encapsulating the payload, wherein the checksum has been determined from byte values of the header and the payload, yet having the checksum remaining detectable as valid upon interpretation of the header and the payload. A signature field that contains the information is inserted into the data field. The signature field has a checksum cheater subfield. A one's complement of a checksum determined from byte values of the information is then placed into the checksum cheater subfield. Accordingly, the checksum in the checksum field of the header remains valid.
    Type: Grant
    Filed: October 26, 2004
    Date of Patent: September 22, 2009
    Assignee: Spirent Communications Inc.
    Inventors: Craig Glenn Fujikami, William Thomas Hatley, Jocelyn Tamie Kunimitsu, Jon Kanji Otaguro, Carl Masami Uyehara