Patents by Inventor Shinshiro Ohtaki

Shinshiro Ohtaki 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).

  • Cleaning device
    Patent number: 3983591
    Abstract: Two cleaning elements, each having a magnet and a brush, are arranged outside and inside of a windowpane. The cleaning elements attract each other by magnetic force through the windowpane and they move simultaneously when one of them is moved in operation. This cleaning device is convenient and safe for cleaning windowpanes of higher buildings because cleaning of both sides of the windowpanes can be done at one time working indoors.
    Type: Grant
    Filed: August 23, 1973
    Date of Patent: October 5, 1976
    Assignee: Shinshiro Ohtaki
    Inventors: Shinshiro Ohtaki, Hiroshi Ogino