Patents by Inventor Tomomi Nagano

Tomomi Nagano 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).

  • Plate roofing material
    Patent number: 5293727
    Abstract: A plate roofing material is divided into an exterior portion which is exposed when a roof is covered with a plate roofing material and an overlap portion which is concealed under an exterior portion of a plate roofing material superimposed on the overlap portion of the plate roofing material. At least one longitudinal groove is formed in the surface of the exterior portion. The longitudinal groove has wide side surface parts alternating with narrow side surface parts with sidewalls formed of a plurality of stepped portions. The longitudinal groove has a linear bottom part having an approximately constant depth and is approximately V-shaped in cross section.
    Type: Grant
    Filed: November 22, 1991
    Date of Patent: March 15, 1994
    Assignee: Daiken Kogyo K.K.
    Inventors: Kenichi Yoshimoto, Kazuhiro Sakamoto, Tadashi Akiyama, Hirofumi Takai, Tomomi Nagano, Mitsuji Hashimoto, Kozo Tamamura