Scaffold Patents (Class D25/66)
  • Goal post structure
    Patent number: D250283
    Type: Grant
    Filed: February 24, 1977
    Date of Patent: November 14, 1978
    Inventor: John H. Norton
  • Load-support module
    Patent number: D251987
    Type: Grant
    Filed: September 20, 1977
    Date of Patent: May 29, 1979
    Assignee: U.B.M. Hover Systems
    Inventor: Ian R. Bristow
  • Adjustable and collapsible scaffold
    Patent number: D252408
    Type: Grant
    Filed: July 22, 1977
    Date of Patent: July 17, 1979
    Inventor: Eugene F. Dempewolf
  • Lightweight trench box
    Patent number: D252950
    Type: Grant
    Filed: August 29, 1977
    Date of Patent: September 18, 1979
    Assignee: AGL Corporation
    Inventor: William F. Birchfield