. . . "Commissioners' opinions in support of the Commission action in the matter of expanded unsintered polytetrafluoroethylene in tape form investigation no. 337-TA-4"@en . . . . . . . . . "Polytetrafluoroethylene in tape form"@en . . . . . "Patents"@en . "Commissioners' opinions in support of the Commission action in the matter of expanded unsintered polytetrafluoroethylene in tape form : investigation no. 337-TA-4"@en .