Patents by Inventor Martin O. Erickson

Martin O. Erickson 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).

  • Sun shades for gun sights
    Patent number: 3983634
    Abstract: Sun shade tubes of variable length and diameter adaptable to the rear sight of most target rifles for keeping the sun or bright light from shining directly into the eyes of the shooter.
    Type: Grant
    Filed: August 4, 1975
    Date of Patent: October 5, 1976
    Inventor: Martin O. Erickson