Patents by Inventor Ronald Melvin Gilbertson

Ronald Melvin Gilbertson 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).

  • Air switch and palm guide for papermaking machinery
    Patent number: 6371347
    Abstract: An air switch including a housing, a lubrication port, a first air inlet port and an exhaust port is disclosed. The housing includes a chamber. The lubrication port is disposed to deliver lubrication into the chamber. The first air inlet port is disposed to introduce air into the chamber. The exhaust port is disposed to exhaust the lubrication and air from the chamber.
    Type: Grant
    Filed: March 9, 2000
    Date of Patent: April 16, 2002
    Inventor: Ronald Melvin Gilbertson