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Subject 

1. Textiles  (16,314)
2. Production Of Cellulose  (16,287)
3. Paper-Making  (16,287)
4. Technical Subjects Covered By Former Us Classification  (12,793)
5. Paper Not Otherwise Provided For  (10,068)
6. Preparation Thereof Not Covered By Subclasses D21c Or D21d  (10,068)
7. Impregnating Or Coating Of Paper  (10,068)
8. Pulp Compositions  (10,068)
9. Treatment Of Finished Paper Not Covered By Class B31 Or Subclass D21g  (10,068)
10. Transporting  (6,879)
11. Performing Operations  (6,879)
12. Technical Subjects Covered By Former Uspc Cross-Reference Artcollections [xracs] And Digests  (5,636)
13. Methods Of Producing Paper Thereon  (4,294)
14. Paper-Making Machines  (4,294)
15. Metallurgy  (4,041)
16. Chemistry  (4,041)
17. More options 

Language 

1. English  (15,409)
2. French  (3,334)
3. German  (1,542)
4. Finnish  (681)
5. Swedish  (415)
6. Russian  (238)
7. Chinese  (105)
8. Norwegian  (63)
9. Polish  (25)
10. Spanish  (23)
11. Korean  (18)
12. Japanese  (17)
13. Portuguese  (15)
14. Indonesian  (15)
15. Dutch  (7)
16. Slovenian  (7)
17. Italian  (6)
18. Danish  (6)
19. Ukrainian  (5)
20. Czech  (2)
21. More options