Patents by Inventor Masami Masuyama

Masami Masuyama 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).

  • Patent number: 4091393
    Abstract: An automatic pencil apparatus for an automated drafting system comprises a gripping means for holding and lifting a lead. The lead is pressed by means of a pressing means. The gripping means is actuated, by a driving means including an electromagnet, in the longitudinal direction. A change-over means supplys compressed air into the pressing means in response to up or down movement of the gripping means. The constant pressure is applied to the lead during drafting and plotting. When the lead is removed from a drafting sheet or is stopped, it is held and lifted up, so as to draw high quality lines and curves independently of the abrasion of the lead.
    Type: Grant
    Filed: June 24, 1976
    Date of Patent: May 23, 1978
    Assignee: Kabushiki Kaisha Daini Seikosha
    Inventors: Masami Masuyama, Tsukasa Edo