Patents by Inventor Mitukazu Watanabe

Mitukazu Watanabe 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).

  • Plunger for a multi-plunger type resin mold device
    Patent number: 4708613
    Abstract: A plunger is used for a multi-plunger type resin mold device which is adapted to be slidably inserted into a pot to permit a resin in the pot into a mold. The plunger includes a forward end member whose forward end edge portion is formed of silicon nitride, silicon carbide or zirconia, the forward end edge portion of said forward end pot member being in contact with the resin in the pot, and a plunger body to which the forward end member is fixed. The forward end member is fixed to the plunger body by threadably inserting an insertion section of the forward end member into a recess formed in the plunger body.
    Type: Grant
    Filed: February 27, 1986
    Date of Patent: November 24, 1987
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Michitoshi Sera, Mitukazu Watanabe, Kiyoshi Aoki