Patents by Inventor Shigeru Murai

Shigeru Murai 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).

  • Cut-wire type ferrous shot for blasting and a process of using a cut-wire type ferrous shot for blasting
    Patent number: 6394881
    Abstract: The present invention discloses a cut wire method of producing a ferrous shot and a cut-wire type ferrous shot for shot-blasting having a hardness of Hv 200 to 300 and a low work hardening ability. Further, the present invention describes a process of using a cut-wire type ferrous shots, comprising preparing the cut-wire type ferrous shots and a ferrous object and projecting the shots to the ferrous object to remove foreign material from the ferrous object.
    Type: Grant
    Filed: May 19, 2000
    Date of Patent: May 28, 2002
    Assignee: Toyo Seiko Co., Ltd.
    Inventors: Takanori Watanabe, Shigeru Murai, Noriyuki Murai, Yoshihiro Watanabe, Kanehisa Hattori