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Patent
Patentdatenbank Kanada 1948
- Patent:CA447297 16.03.1948 Luhn, Hans P. (P) IBM (P) International Business Machines Corp. : Calculating machine
- Patent:CA447662 06.04.1948 Arni Arnason Addressograph-Multigraph Corp. : Calculating machine
- Patent:CA447693 06.04.1948 Niemann, Frederick (P) Adolph Felt und Tarrant (P) Felt & Tarrant Manif. Co. : Actuator button
- Patent:CA452777 23.11.1948 Thornwald Peter Lampe : Course, distance and time plotting device