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Classification bulletin of U.S. Patent Office from Jan. 1, 1920 to June 30, 1920, containing classification of subjects of invention revised by Classification Division of U.S. Patent Office
- Author / Creator
- Available as
- Online
Details
- Format
- Books
- Language
- English
- Publication
-
- [Washington] : GPO, 1920
- Physical Details
-
- 1 online resource (113 pages)
- Semiannual bulletin presenting revisions to patent categories and definitions. Some bulletins also include revisions to classification title index.