Patents by Inventor Frederick A. Larson

Frederick A. Larson 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 tool for electrical or gas water heaters
    Patent number: 4237572
    Abstract: The present cleaning tool for electrical or gas water heaters provides a scraper and a member for pulling out of the heater the scraped off scale or rust or the like that tends to deposit on the internal heater walls and bottom. In a preferred embodiment of this tool the scraper is secured to one end and the pulling out member is secured to the other end of a common handle.
    Type: Grant
    Filed: June 14, 1979
    Date of Patent: December 9, 1980
    Inventor: Frederick A. Larson