Classification definitions.
- Publisher: U.S. Office of Patent Classifications
- Print ISSN:
- Electronic ISSN:
- OCLC Number: 10353529
- Subject: Patents United States Classification.
- Subject code: T
- Publication history:
Print Holdings
| Archiving Institution | Program | Holdings Description | Retention |
|---|---|---|---|
| HathiTrust (HATHI) | HTDL | Bulletin no.19 1907; Bulletin no.21 1908; Bulletin no.23-41 1909-1918; Bulletin no.42-45 1918-1921; Bulletin no.46-57 1921-1926; no.311-323 1950; no.1-25 1967; no.116-140 1967; no.180-210 1967; no.340-408 1967; no.26-50 1968; no.51-65 1968; no.66-90 1968; no.141-161 1968; no.162-179 1968; no.281-310 1969; no.415-444 1969 | permanent |