Revised Classes and Subclasses of Subjects of Invention in the United States Patent Office, 1912
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Revised Classes and Subclasses of Subjects of Invention in the United States Patent Office, arranged in numerical order: a supplement to the Manual of Classification, Revised to January 1, 1912 (including Classification Bulletin No. 27). Washington: Government Printing Office, 1912.
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Contains a full schema, with descriptions and cross-references, of the United States Patent Classification system, current to the beginning of 1912. The class numbers go to 245 with aeronautics being 244 and "Wire Fabrics and Structure" 245. It is possible there are unused lower class numbers.
| Original title | Revised Classes and Subclasses of Subjects of Invention in the United States Patent Office, arranged in numerical order: a supplement to the Manual of Classification, Revised to January 1, 1912 (including Classification Bulletin No. 27) |
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| Simple title | Revised Classes and Subclasses of Subjects of Invention in the United States Patent Office |
| Authors | United States Patent Office |
| Date | 1912 |
| Countries | US |
| Languages | en |
| Keywords | patent classification |
| Journal | |
| Related to aircraft? | |
| Page count | 495 |
| Word count | |
| Wikidata id |
