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A patent is a legal measure which gives the inventor the exclusive right to commercially exploit his/her invention regardless of the existence of any previous patents whatsoever.
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The possibility of making profit from an invention, in an amount enough to cover the money spent in research, is one of the reasons inventors engage in research in the first place.
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By cross-licensing a patent, an inventor will usually miss the opportunity of having access to market and thus of earning income from that particular invention.
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In line 7, the expression “i.e.” means in Portuguese isto é or ou seja.
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In line 14, the word “parties” can be correctly translated into Portuguese as interessados.
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Sometimes an operating system is necessary in order to get a computer to work.
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Although there is a large quantity of operating systems, only a small number of them have been successful in becoming popular.
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As used in the text, “enhanced” (l.9) and “throughout” (l.10) can be correctly replaced by improved and outside, respectively.
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In the course of time information replaced hardware as the main concern when it comes to network systems.
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The word “it” (l.6) refers back to “The operating system” (l.3-4.)