John Wyeth and Brother Limited
Patent: US4029668 A1, 1977 ;

John Wyeth and Brother Limited
Patent: US4009169 A1, 1977 ;

John Wyeth and Brother Limited
Patent: US4009169 A1, 1977 ;

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John Wyeth and Brother Limited
Patent: US4031102 A1, 1977 ;

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John Wyeth and Brother Limited
Patent: US4044138 A1, 1977 ;