Patents by Inventor Fumio Yokoyama

Fumio Yokoyama 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).

  • Device and method for calculating required quantity of material
    Patent number: 6535773
    Abstract: A material/quantity requirements arithmetic determination system which can ensure enhanced processing speed by uniformizing a load occurring in execution of arithmetic processings and suppressing occurrence of overhead to a possible minimum. The material/quantity requirements arithmetic determination system includes a plurality of material/quantity requirements planning (MRP) arithmetic units disposed in parallel for determining arithmetically types of items, quantities thereof and delivery-appointed terms thereof which are required for manufacturing a predetermined article on the basis of a production schedule of the article.
    Type: Grant
    Filed: December 3, 1999
    Date of Patent: March 18, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Takahiro Tsukishima, Masahiro Sato, Masahito Takata, Sachiko Yoshida, Fumio Yokoyama