Patents by Inventor Sadamu Tohdoh

Sadamu Tohdoh 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).

  • Waste-gas suppressor for internal-combustion engines
    Patent number: 3996902
    Abstract: Waste-gas suppressor for internal-combustion engines, utilizing negative pressure generated in the carburetor of the engine. A water regulator operated by the negative pressure adjusts water flow in proportion to engine speed, the water being evaporated by the exhaust heat of the engine. The resulting steam is supplied to an air cleaner, and the cleaned air containing the steam is supplied to the combustion chamber of the engine.
    Type: Grant
    Filed: May 14, 1974
    Date of Patent: December 14, 1976
    Inventors: Toyosuke Ri, Sachio Yasuda, Sadamu Tohdoh