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History of classification of patents

By: Material type: TextTextPublication details: U.S.A.: The Journal of the patent office society, 1946 Description: 84pSubject(s):
Item type: Books
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Holdings
Item type Current library Call number Materials specified Status Date due Barcode
Books Books National Science Library D 025.4:608.3(091) H6 (Browse shelf(Opens below)) Available 3111

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