Patents by Inventor Arnold E. Crowson

Arnold E. Crowson 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).

  • Ventilated welding shield
    Patent number: 4890335
    Abstract: A welding shield is designed to have a flow of ventilating air directed across both exterior and interior surfaces of a viewing lens forming a part of the shield. Both integral and separable air supply arrangements are used, and all of the supplied air is filtered before delivery across the shield.
    Type: Grant
    Filed: July 27, 1988
    Date of Patent: January 2, 1990
    Inventor: Arnold E. Crowson