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Last edited by Ben Companjen
May 19, 2012 | History
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Books, Classification, PatentsPlaces
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1
Key to the classifications of the patent specifications of France, Germany, Austria, Netherlands, Norway, Denmark, Sweden, and Switzerland, in the library of the Patent office.
1915, H.M. Stationery off., Darling [printers]
in English
- 3d ed.
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Feedback?May 19, 2012 | Edited by Ben Companjen | merge authors |
January 20, 2010 | Edited by WorkBot | add subjects and covers |
December 11, 2009 | Created by WorkBot | add works page |