Word: linear
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Dates: during 1920-1929
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...search purposes for use of the examining corps to determine novelty of applications for patents. Copies are also kept in stock for the purpose of sale so that they may be available to the public, practically at cost. Such copies number about 50,000,000 and occupy about 20 linear miles of single shelving in the Patent Office, over 200,000 copies of such patents being sold each month for 10¢ each...