Patents by Inventor Christopher Columbus Hill

Christopher Columbus Hill 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).

  • Vaneless arrow shaft
    Patent number: 5971875
    Abstract: With the use of a smaller tube which fits inside the nock end of a arrow shaft and the smaller tube having molded in it spiraled grooves which acts upon dimples that are molded in the arrow shaft body and when the bowstring drives the smaller tube into the arrow shaft causeing the whole arrow shaft to spinn, the results of which allows the arrow shaft to oscillate less, fly stright without vanes, and faster with more peneration and will enter a close range target stright.
    Type: Grant
    Filed: March 31, 1998
    Date of Patent: October 26, 1999
    Inventor: Christopher Columbus Hill