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Recording patent agreements and limiting patents to 20 years : hearings before the committee on Patents House of Representatives, United States House, Seventy-ninth congress, first session on H.R. 2630 ... H.R. 2631 ..., H.R. 2632 ... May 29, 31, June 1
- Format:
- Book
- Language:
- English
- Other Title:
- Recording patent agreements and limiting patents to 20 years
- Place of Publication:
- Washington: U.S. Gov't. Printing Office,
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