Patent

Patent:CA552128 21.01.1958 Svoboda, Antonin (P) Aritma : Decadic relay adding machine
Patent:CA555598 08.04.1958 Lawrence W. Brugman, Raymond F. Koch Comptometer (P) Corp. : Calculating machine
Patent:CA556754 29.04.1958 Lehre, Otto (P) Sterling Plastics (P) CO. : Calculating-apparatus
Patent:CA560258 15.07.1958 Edgar L. Wurtele : Fuel and mileage calculator for vehicles and the like
Patent:CA563896 30.09.1958 Alton G. Snyder NCR (P) National Cash Register Comp. : Calculating machine with automatic repeat mechanism
Patent:CA564669 14.10.1958 Hiller, Vernon T.; Martin, Charles L. : Carpenters slope tape
Patent:CA565200 28.10.1958 Eugenio Estrems, Ioino Ghertman, Edmond Febvre, Marcel J. Robineau IBM (P) International Business Machines Corp. : Calculating machine
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