42720634
9781331215844
Lawrence Langner is the author of 'Basic Patent and Trade-Mark Laws of the Principal Belligerent Powers: Together With War Legislation, Ordinances, and Edicts Since August 1, 1914, to ... Trade-Marks, Designs (Classic Reprint)', published 2015 under ISBN 9781331215844 and ISBN 1331215846.
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