Jaffe and Trajtenberg (2002)
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Adam B. Jaffe and Manuel Trajtenberg. 2002. Patents, Citations, and Innovations: A Window on the Knowledge Economy. MIT Press. 478 pages.
The authors are prestigious economists whose work on modern patents is often cited.
This work may the be definitive source of the term NClass, which seems to mean the first 3 digits of a USPC code.[1] They use the term "catcode" for the first 2 digits of a USPC. They use these concepts to measure technological distance between patents. Two patents in the same NClass have a technological distance of zero from one another, and if they are in different 1-digit classes they are at a distance of 1. (page 61)
References
| Original title | Patents, Citations, and Innovations: A Window on the Knowledge Economy |
|---|---|
| Simple title | Patents, Citations, and Innovations |
| Authors | Adam B. Jaffe, Manuel Trajtenberg |
| Date | 2002 |
| Countries | US |
| Languages | en |
| Keywords | patents, citations |
| Journal | |
| Related to aircraft? | 0 |
| Page count | 478 |
| Word count | |
| Wikidata id |
