His machine was substantially better than its competition, Hollerith and Powers, through the mechanism of punched card pre-selection.
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This team provided several and more effective new ideas the Bull machine, causing it to be superior to the Hollerith's one used then, the IBM precursor.
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Fredrik then signed a contract with society Oka, led by Reidar Knutsen, which took over the costs of manufacturing and marketing.
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Among other things, he collaborated with Gerhard Armauer Hansen who discovered Mycobacterium leprae the causative agent of leprosy, in the investigation of the effects of leprosy in the eyes.
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At the same time, Bull had contacted an old friend from high school by Nordstrand, Reidar Knutsen who headed the company Oka.
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Its patent rights were acquired by Oka, where Knutsen, loyal to the ideas of Bull, continued the expansion of the machine and the company.
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