Patents by Inventor Edgar E. Dudley

Edgar E. Dudley 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).

  • Direct height measuring device for surveying instruments
    Patent number: 4888881
    Abstract: A direct measuring device for the direct and exact measurement of the height of a surveying instrument above a ground point. The direct measurement device includes a frame having an upstanding portion and a pair of arms substantially normally extending therefrom. The upper arm has an adapter thereon which is similar to the base or centering flange of the theodolite or other surveying instrument to be used in the surveying operation. The adapter is positioned in an instrument support (tribrach) carried on the tripod in a manner similar to that which the base or centering flange of a surveying instrument is mounted in the tribrach, and a measuring tape secured to the lower arm of the frame measures the distance to the ground from the device. The surveying instrument is then positioned on the tripod in the place of the direct measurement device.
    Type: Grant
    Filed: December 5, 1988
    Date of Patent: December 26, 1989
    Inventor: Edgar E. Dudley
  • Height finder for a surveying instrument support
    Patent number: D302251
    Type: Grant
    Filed: July 24, 1986
    Date of Patent: July 18, 1989
    Inventor: Edgar E. Dudley
  • Height finder for a surveying instrument support
    Patent number: D319986
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: September 17, 1991
    Inventor: Edgar E. Dudley