Patents by Inventor Isamu Katayama

Isamu Katayama 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).

  • Counter plate and cutting die for die cutting machine
    Patent number: 6189414
    Abstract: A counter plate is provided as a receiving surface opposed to a cutting die to be installed in a die cutting machine for stamping a sheet material into a predetermined shape and making ruled lines thereon, wherein the cutting die has rulings and cutting blades and the counter plate has edge bearing portions formed on portions corresponding to the cutting blades and hollows corresponding to the rulings, and a process for manufacturing the cutting die and counter plate comprising hardening selected portions thereof using laser beam irradiation.
    Type: Grant
    Filed: August 7, 1998
    Date of Patent: February 20, 2001
    Assignees: Yoshizawa Industry Inc., Katayama Steel Rule Die, Inc.
    Inventors: Akinori Yoshizawa, Isamu Katayama, Shigeru Nagasawa