Patents by Inventor Edward Opal

Edward Opal 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).

  • Process of sighting an archery bow
    Patent number: 3942507
    Abstract: A process is provided for sighting an arrow through the separated strands of a bow string. The process includes the manual adjustment of two circular disks, that have been positioned in the string so as to hold the strands separated from each other, along the axis of the string so as to provide adjustable sighting for different users.
    Type: Grant
    Filed: April 15, 1974
    Date of Patent: March 9, 1976
    Inventor: Edward Opal