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the US government department that decides which new inventions can be given a PATENT (= the right to make and sell a new invention) . There is a similar department in the UK called the PATENT Office.
Definition: Meaning of, railroad tunnel in English to English dictionary.
Pronunciation: / ˈreɪlrəʊd ˈtʌn(ə)l /
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| North American English ; railway tunnel elsewhere |