Patents by Inventor Alvin L. Swenson

Alvin L. Swenson 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).

  • Pig extractor
    Patent number: 4759579
    Abstract: A pig extractor for extracting pigs from a pipe or conduit. The extractor has an elongated shaft with a handle at one end and a spring latch at an opposing end.
    Type: Grant
    Filed: May 12, 1987
    Date of Patent: July 26, 1988
    Inventor: Alvin L. Swenson
  • Duck decoy netting or the like
    Patent number: D308715
    Type: Grant
    Filed: April 22, 1986
    Date of Patent: June 19, 1990
    Inventor: Alvin L. Swenson