Patents by Inventor Tsunemi Oiwa

Tsunemi Oiwa 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).

  • Thermal recording medium
    Patent number: 5246766
    Abstract: A thermal recording medium including a base layer containing a resin having a functional group which chemically bonds with a metal having a low melting point, such as Sn-Pb alloy, and a thermal recording layer made of a thin film with low resistivity of a low melting point metal formed on said base layer such that when a part of the thermal recording layer is heated, the heated part melts and perforates to record information.
    Type: Grant
    Filed: August 10, 1990
    Date of Patent: September 21, 1993
    Assignee: Hitachi Maxell Ltd.
    Inventors: Ryuzo Fukao, Tsunemi Oiwa, Shuichi Wada, Akio Shimizu, Seiichi Asada, Hisanobu Mikamo, Akira Kato