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Manual Classification of Patents
Description
The Manual of Classification has over 400 classes. What follows is the Index to the Classification, where you can determine the class of your idea by searching keywords.
Identifier
http://www.ibiblio.org/patents/
Tags:
Historic
Citation
“Manual Classification of Patents,”
ibiblio catalog
, accessed July 18, 2024,
https://www.ibiblio.org/catalog/items/show/3762
.