Patents by Inventor Durwood T. Andrews

Durwood T. Andrews 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).

  • Patent number: 4844207
    Abstract: A sportsman's ladder for allowing convenient climbing of trees and the like includes a number of sections assembled together in telescoping relationship. Each section has secured thereto a plurality of spaced-apart steps extending laterally from opposite sides thereof in an alternating manner. The ladder further includes a tree engaging means for mounting the ladder to a tree.
    Type: Grant
    Filed: April 19, 1988
    Date of Patent: July 4, 1989
    Inventors: Dale D. Andrews, Durwood T. Andrews
  • Patent number: 4762200
    Abstract: A sportman's ladder for allowing convenient climbing of trees and the like includes upper and lower sections assembled together in telescoping relationship. Each section has secured thereto a plurality of spaced-apart steps extending laterally from opposite sides thereof in an alternating manner. The upper section includes a tree limb engaging hook formed as a square, cornered structure having angled gussets at the corners thereof for structural bracing and for improved modes of engagement on the tree limb. The upper section also has a pair of cleats which receive and mount the lower section to the upper section in stacked relationship with respect thereto for convenient carrying of the upper and lower sections when unassembled.
    Type: Grant
    Filed: November 24, 1987
    Date of Patent: August 9, 1988
    Inventors: Dale D. Andrews, Durwood T. Andrews