Patents by Inventor Alexander Wisniewski

Alexander Wisniewski 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).

  • Chimney safe heat saver
    Patent number: 4240361
    Abstract: Safety device in the general form of an apertured disc which aids in keeping sparks and flames from paper, kindling, wood etc., from shooting up the chimney and possibly causing fire; the device also helps to stop soot build up and it controls the rate at which the wood burns, saving fuel.
    Type: Grant
    Filed: February 21, 1979
    Date of Patent: December 23, 1980
    Inventor: Alexander Wisniewski