Patents by Inventor Susumu Ohhazama

Susumu Ohhazama 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).

  • Oil composition for electrical discharge machining
    Patent number: 5136116
    Abstract: Oil compositions are disclosed for use in electrical discharge machining. Selected mineral or synthetic oils or their blends are combined with specified amounts of selected alkylbenzenes. Machining speed is greatly improved.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: August 4, 1992
    Assignee: Nippon Oil Co., Ltd.
    Inventors: Susumu Ohhazama, Fujio Ohta