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1925 Burroughs Adding Machine 1926 Burrough's Adding Machine 1936 American Stationary Co. #1 1936 American Stationary Co. #2 1937 Addressograph Multilithing 1937 Monroe Calculator 1938 Mimeograph Machine 1939 Mimeograph Machine #1 1939 Mimeograph Machine #2 1940 Mimeograph Machines 1944 Mimeograph Copy Machines 1945 Dictaphone Dictation Machine 1946 Dictaphone Dictation Machine