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2565231_Singer_KEY_SHIFT_MECHANISM.pdf 585212
2700446_Flexowriter_Patent_Jan55.pdf 4812218
2963137_GiddingsAndLewis_CONTROLS_FOR_A_TYPEWRITER_AND_ASSOCIATED.pdf 2131242
3202878_Friden_PLUGBOARD_APPARATUS_WITH_LATERAL_MOVEMEN.pdf 698129
3327828_Friden_KEYBOARD_MECHANISM_HAVING_LATCH_MEANS.pdf 1108068
3327829_Friden_FOR_KEYBOARD_MECHANISM.pdf 264716
3355000_Friden_TYPE_BAR_ACTUATING_MECHANISM_WITH_SEPARA.pdf 411606
3366322_Friden_BLODGETT_HIGH_SPEED_PUNCH.pdf 1394477
3419850_Friden_PROGRAMMABLE_COMPUTER_UTILIZING_NONADDRE.pdf 5233698
3511352_AUTOMATIC_BAR_TYPEWRITERS_AND_THE_LIKE_H.pdf 655227
3975716_Arrangement_in_connection_with_a_printer.pdf 509869