Patents by Inventor Eihachi Ogino

Eihachi Ogino 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).

  • Method of producing a resin mold for rear projection screen
    Patent number: 4948537
    Abstract: A method of producing a resin mold that includes the steps of pouring a first resin into a metal mold, curing the first resin at a first temperature thereby making an intermediate resin mold made of the first resin, separating the intermediate resin mold from the metal mold, pouring a second resin into the intermediate resin mold, curing the second resin at a second temperature thereby making a final resin mold made of the second resin and separating the final resin mold from the intermediate resin mold, wherein by selecting the first and second curing temperatures of the first and second resins, the final resin mold will have the same size as that of the metal mold.
    Type: Grant
    Filed: December 15, 1988
    Date of Patent: August 14, 1990
    Assignees: Sony Corporation, Arisawa Mfg. Co., Ltd.
    Inventors: Akio Ohkoshi, Takuji Inoue, Eihachi Ogino, Tsutomu Nakazawa