Brevet

Patent:FR192522 21.08.1888 American Arithmometer (P) Comp. : Perfectionnements apportés aux calculateurs mécaniques
Patent:GB189317126 01.04.1889 American Arithmometer (P) Co. : Improvements in Calculating Machines
Patent:GB189721268 12.03.1898 American Arithmometer (P) Comp. : Improvements in Printing Attachments for Calculating Machines
Patent:GB189809600 25.06.1898 American Arithmometer (P) Co. : Improvements in Locking the Keys of Calculating and like Machines
Patent:US396070 15.01.1890 Burroughs, William (P) American Arithmometer (P) Comp. : Ribbon-winding device
Patent:US420617 04.02.1890 Burroughs, William (P) American Arithmometer (P) Comp. : Printing-recorder
Patent:US590772 28.09.1897 William Henry Pike Jr American Arithmometer (P) Co. : Device for duplicate printing
Patent:US756168 29.02.1904 Jackson, Albert C. (P) American Arithmometer (P) : Calculating Machine

Rechnerlexikon