Patents by Inventor John M. David

John M. David 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).

  • Tree stand rangefinder and method of using the same
    Patent number: 5594994
    Abstract: A hand held device adapted to be used by an archer situated in an elevated position to aid in the determination of the approximate ground distance to a stationary or moving target in a simple and efficient manner in order that he might thereby increase his chances of hitting the target.
    Type: Grant
    Filed: November 20, 1995
    Date of Patent: January 21, 1997
    Inventor: John M. David
  • Tree stand rangefinder and method of using the same
    Patent number: 5467531
    Abstract: A hand held device adapted to be used by an archer situated in an elevated position to aid in the determination of the approximate ground distance to a stationary or moving target in a simple and efficient manner in order that he might thereby increase his chances of hitting the target.
    Type: Grant
    Filed: July 20, 1994
    Date of Patent: November 21, 1995
    Inventor: John M. David