Patents Assigned to Matrix Toys
  • Joint element for construction set
    Patent number: D257365
    Type: Grant
    Filed: May 8, 1978
    Date of Patent: October 14, 1980
    Assignee: Matrix Toys
    Inventor: Richard J. Gabriel
  • Joint element for construction set
    Patent number: D257366
    Type: Grant
    Filed: February 8, 1979
    Date of Patent: October 14, 1980
    Assignee: Matrix Toys
    Inventor: Richard J. Gabriel