Patents by Inventor Masashi Ando

Masashi Ando 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).

  • Ballpoint pen tip
    Patent number: 5899625
    Abstract: A ballpoint pen tip including a metallic pipe having a plurality of inwardly projecting portions at a neighborhood of a front end portion of the pipe at regular intervals, and a front end edge portion at a front end of the pipe, and a ball rotatably held between the front end edge portion and the plurality of inwardly projecting portions, wherein the pipe satisfies a relation of A/T.ltoreq.5.8 where A is an outer diameter of the ball and T is a thickness 10 of the pipe, and also the relation of B/T.ltoreq.2.3 where B is a diameter of a virtual inscribing circle contacting a top of the plurality of inwardly projecting portions and T is the same as above.
    Type: Grant
    Filed: December 9, 1997
    Date of Patent: May 4, 1999
    Assignee: The Pilot Ink Co., Ltd.
    Inventors: Masashi Ando, Nobuo Sekine, Masahiro Kondo, Hideaki Asami, Nobuo Matsubara
  • Flame-retardant fiber
    Patent number: 4079036
    Abstract: Shaped articles comprised of PVA and PVC having improved flame-retardancy and resistance to discoloration resulting from heat treatment are provided by the incorporation therein of calcined stannic acid, characterized by a specific crystal size.
    Type: Grant
    Filed: September 2, 1975
    Date of Patent: March 14, 1978
    Assignee: Kuraray Co., Ltd.
    Inventors: Akio Ohmori, Masashi Ando, Akitsugu Akiyama