Patents by Inventor Yoshio Ohshima

Yoshio Ohshima 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).

  • Anaerobic digestion method
    Patent number: 4985149
    Abstract: Sewage sludge or an agricultural or fish waste material is subjected to pretreatment in the form of wet mill treatment and then is subjected to anaerobic digestion.
    Type: Grant
    Filed: March 20, 1989
    Date of Patent: January 15, 1991
    Assignees: Public Works Research Institute, Ministry of Construction, Kabushiki Kaisha Yakult Honsha, Fujita Corporation
    Inventors: Yoshio Ohshima, Tsunekazu Watanabe, Keizaburo Watanabe, Noboru Nonoyama, Masayoshi Kitazume, Yukihiro Tomita