Patents by Inventor Michihiro Ishizaka

Michihiro Ishizaka 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).

  • Loop transmission method
    Patent number: 4685105
    Abstract: This invention relates to a time-division transmission method for a plurality of terminals connected to a looped transmission line, in which a plurality of slots being provided with regions, where three kinds: "Free", "Busy" or "Neutral" of access control information are set, are made to circulate on the transmission line, so that when the transmission apparatus at the terminal having data to be transmitted receives a slot of "Free", a necessary number of subsequent slots to the slot of "Free" are continuously used to carry out data transmission, the access control information at the slot in use is changed to "Busy", the access control information of a slot at the head of the slots not used is set to "Free", and an access control information of a slot subsequent to the above slot is set to "Neutral".
    Type: Grant
    Filed: October 22, 1985
    Date of Patent: August 4, 1987
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Toshihiro Shikama, Takahisa Ota, Michihiro Ishizaka, Hirofumi Kira, Akira Horiguchi, Yuji Kooi