patent

Patent:AT18131B 10.11.1904 Howieson, John Thomas (P) und Spiekermann, Frank (P) : Rechenmaschine
Patent:AT47330B 10.04.1911 Howieson, John Thomas (P) : Mit Schreibmaschinen beliebiger Type kuppelbare Rechenmaschine samt geeigneter Triebvorrichtung, Zehnerschaltung und Tastensperrung für Rechen- bezw. Schreibrechenmaschinen
Patent:CA84955 19.01.1904 Howieson, John Thomas (P) : Calculating machine
Patent:DE152639 31.08.1902 Howieson, John Thomas (P) und Spiekermann, Frank (P) : Addierwerk für Schreibmaschinen
Patent:DE258767 16.12.1909 Howieson, John Thomas (P) : Schreibrechenmaschine
Patent:GB190218853 28.05.1903 Howieson, John Thomas (P), Spiekerman, Frank (P) : Improvements in Calculating Machines
Patent:GB190930426 30.01.1911 Howieson, John Thomas (P) : Improvements in the Column Printing and Denomination Selecting Arrangements of Computing Attachments for Typewriters
Patent:GB191028058 30.01.1911 Howieson, John Thomas (P) : Improvements in the Reversing and Transfer Mechanism of Calculating and like Machines
Patent:GB191028362 30.01.1911 Howieson, John Thomas (P) : Improvements in and relating to the Differential Actuating Mechanism of Computing Attachments for Typewriters
Patent:GB191028363 30.01.1911 Howieson, John Thomas (P) : Improvements in and relating to Spring Motors for Driving Calculating and like Machines

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