Classification orders index.
- Publisher: U.S. Dept. of Commerce, Patent and Trademark Office, Office of Electronic Information Products and Services
- Print ISSN:
- Electronic ISSN:
- OCLC Number: 33005334
- Subject: Patents United States Classification Indexes.
- Subject code: T
- Publication history:
Print Holdings
| Archiving Institution | Program | Holdings Description | Retention |
|---|---|---|---|
| HathiTrust (HATHI) | HTDL | 1947/1976; 2010/Jun | permanent |