Patents Assigned to William Ostertag
  • Structural shell for protective headgear
    Patent number: 5950243
    Abstract: A structural shell for protective headgear includes a shell-form body composed of a plurality of cells. This structural shell can withstand loads much greater than conventional single walled structural shells, without buckling.
    Type: Grant
    Filed: June 16, 1997
    Date of Patent: September 14, 1999
    Assignees: Alberta Research Council, William Ostertag
    Inventors: William Robert Winters, Ray Fan, William Ostertag, Surindar Pal Singh