Patents by Inventor David C. Freshel

David C. Freshel 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).

  • Tree treating system
    Patent number: 3992813
    Abstract: A tree treating system comprising a plurality of injector assemblies, each injector assembly comprising a pipe insertable in an opening in a tree, a female quick disconnect one way valve socket connected to the pipe as an outlet, and a male connector connected to the pipe as an inlet.
    Type: Grant
    Filed: July 7, 1975
    Date of Patent: November 23, 1976
    Inventor: David C. Freshel