Patents by Inventor Tsuneki Azetsu

Tsuneki Azetsu 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).

  • Contact strip for pantograph used on electric railcar
    Patent number: 5041702
    Abstract: A contact strip for a pantograph used on an electric railcar, comprising a front surface member which is to be in contact with the trolley wire to collect current from the latter and a rear surface member which is to be fixed to the collector head, the front surface member being made of an abrasion-resistant metal plate having desired mechanical characteristics and resistivity, the rear surface member being made of a metal plate having the better mechanical characteristics, a same or lower resistivity than the front surface member and a specific gravity less than that of the front surface member, the front and rear surface members being connected integrally to each other.
    Type: Grant
    Filed: August 25, 1989
    Date of Patent: August 20, 1991
    Assignee: Teikoku Carbon Industry Co., Ltd.
    Inventor: Tsuneki Azetsu