Concordance, United States patent classification to international patent classification
United States
Bok Engelsk 1971
| Annen tittel | |
|---|---|
| Utgitt | [Washington, D.C.] : U.S. Dept. of Commerce, Patent and Trademark Office, Patent Documentation Organizations , 1971
|
| Omfang | iii, 199 s.
|
| Utgave | 2nd ed.
|
| Emner |
