Patents by Inventor Yozo Date

Yozo Date 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).

  • Chain saw guide bar
    Patent number: 5035058
    Abstract: A guide bar for a chain saw, the bar having oppositely located flat sides. A plurality of recesses are formed in each of the sides, the recesses on one side being offset from the recesses on the other side. At least some of the recesses are filled with a lightweight material. Some of the recesses may also function as oil reservoirs and oil passages between the guide grooves of the bar.
    Type: Grant
    Filed: July 9, 1990
    Date of Patent: July 30, 1991
    Assignee: Suehiro Seiko Kabushiki Kaisha
    Inventors: Yozo Date, Toshihiro Tsumura
  • Chain saw guide bar
    Patent number: 5014435
    Abstract: A chain saw guide bar including an inner plate and a pair of outer plates fixed to both flat sides of the inner plate. The inner plate has holes formed therethrough. The outer plates also have holes formed therethrough, but they are smaller than the holes of the inner plate. The outer holes are each aligned with one of the inner holes, and the holes are filled with a lightweight material.
    Type: Grant
    Filed: July 23, 1990
    Date of Patent: May 14, 1991
    Assignee: Suehiro Seiko Kabushiki Kaisha
    Inventors: Yozo Date, Toshihiro Tsumura