Patents by Inventor Shigeru Karasawa

Shigeru Karasawa 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).

  • Toll collection system, onboard units and toll collection method
    Patent number: 6390365
    Abstract: A toll collection system to collect tolls by way of wireless communication between an onboard unit that is loaded on a vehicle and stacks an IC card and a gate equipment that is installed at a tollgate. The gate equipment sends information showing the presence or the number of wireless communication equipment installed at the latter stage through the wireless communication to the onboard unit, which in turn causes the writing process on an IC card after executing the communication with all of the wireless communication equipment of the gate equipment.
    Type: Grant
    Filed: August 27, 1999
    Date of Patent: May 21, 2002
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Shigeru Karasawa