Patents by Inventor Johann Boske

Johann Boske 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).

  • Means to counteract a clogging of drain pipes
    Patent number: 3936380
    Abstract: A plastic or clay drain system includes porous plastic or clay pipes at least partially covered with filter material and a dispenser of tannin for introducing tannin into the drain flow.
    Type: Grant
    Filed: July 15, 1974
    Date of Patent: February 3, 1976
    Inventor: Johann Boske