Patents by Inventor Tetsuhiro Ohsima

Tetsuhiro Ohsima 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).

  • Seamless semiconductive belt
    Patent number: 5021036
    Abstract: The invention provides a seamless semiconductive belt produced by cutting a seamless tubelike film made of a polycarbonate containing conductive carbon to desired length at right angles to the axial direction of the film, the film having a surface electrical resistance of about 10.sup.5 to about 10.sup.13 .OMEGA./.quadrature. and the ratio of minimum surface electrical resistance to maximum surface electrical resistance being at least 0.01.
    Type: Grant
    Filed: August 28, 1990
    Date of Patent: June 4, 1991
    Assignee: Gunze Ltd.
    Inventors: Akihiro Tanaka, Tetsuhiro Ohsima, Takumi Sakamoto