Patents by Inventor Patrick B. Knowles

Patrick B. Knowles 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).

  • Copper pipe cleaning system
    Patent number: 6745426
    Abstract: A copper pipe cleaning assembly has an interior cleaning member and an exterior cleaning member, which are easily joined or separated as required, depending on the area of the pipe to be cleaned.
    Type: Grant
    Filed: October 6, 2003
    Date of Patent: June 8, 2004
    Inventor: Patrick B. Knowles
  • Copper pipe cleaning system
    Patent number: 6704964
    Abstract: A copper pipe cleaning assembly has an interior cleaning member and an exterior cleaning member, which are easily joined or separated as required, depending on the area of the pipe to be cleaned.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: March 16, 2004
    Inventor: Patrick B. Knowles