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  2. List of prolific inventors - Wikipedia

    en.wikipedia.org/wiki/List_of_prolific_inventors

    Pats /Yr: The average number of patents received per year [Pats column divided by Yrs column, rounded]. Inv / Pat: The average number of inventors listed on the inventor's most recent 50 patents as of September 7, 2021 or on the date the inventor was added to the table if later. "NA" signifies the inventor was active prior to digital records.

  3. Belgium - Wikipedia

    en.wikipedia.org/wiki/Belgium

    A number of non-official minority languages are spoken as well. [171] As no census exists, there are no official statistical data regarding the distribution or usage of Belgium's three official languages or their dialects . [ 172 ]