Patents by Inventor Alvin E. Warren

Alvin E. Warren 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: 4230203
    Abstract: A tree climbing apparatus comprising a lower support and an upper support wherein each support includes a platform member and brace members in the form of spaced front and back blades with a pair of spaced tubular members connecting the back blade to the platform member. The lower platform includes a foot receiving area designed to cooperate with foot engageable elements to secure an occupant's feet to the platform and a foot support area located rearwardly of the foot receiving area. The upper platform comprises a seat designed to be disposed closely adjacent to the tree such that when the occupant is disposed on the seat with his feet engaged with the foot engageable elements of the lower platform, the occupant's knees are spaced apart straddling the tree.
    Type: Grant
    Filed: May 1, 1978
    Date of Patent: October 28, 1980
    Inventors: George B. Sweat, Alvin E. Warren
  • Patent number: D248875
    Type: Grant
    Filed: December 10, 1976
    Date of Patent: August 8, 1978
    Inventors: Alvin E. Warren, George B. Sweat
  • Patent number: D275235
    Type: Grant
    Filed: May 17, 1982
    Date of Patent: August 21, 1984
    Assignee: Warren & Sweat Manufacturing Company
    Inventors: Alvin E. Warren, George B. Sweat