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English | 47 US | Available |
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[Heidelberg, Germany] : [Springer], 1984.
English | 34 DE | Available |
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Buffalo, New York : The Patent and Trademark Office Society, 1976.
English | 47 US | Available |
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Ottawa, Ontario : Intellectual Property Institute of Canada, 1984.
French | 4 CA | Available |
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[Heidelberg, Germany] : [Springer], 1975.
English | 34 DE | Available |
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