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Patent
Patentdatenbank Kanada 1889
- Patent:CA31618 18.06.1889 Franklin W. Brooks : Coin operated calculating machine
- Patent:CA36741 06.01.1889 Fowler, George B. (P) : Adding machine
- Patent:CA38089 01.02.1889 Joseph Edward Blackshaw, George Henry Rogers : Adding machine
- Patent:CA49823 09.05.1889 Joshua Snider, Edgar Troyer : Calculating machine