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Creation Date 

1. Before 1982  (1)
2. 1982 To 1982  (23)
3. 1983 To 1983  (19)
4. 1984 To 1985  (46)
5. After 1985  (58)
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Subject 

1. Textiles  (137)
2. Production Of Cellulose  (132)
3. Paper-Making  (132)
4. Apparatus Therefor  (64)
5. Regeneration Of Pulping Liquors  (63)
6. Production Of Cellulose By Removing Non-Cellulose Substancesfrom Cellulose-Containing Materials  (63)
7. Fibrous Raw Materials Or Their Mechanical Treatment  (48)
8. Transporting  (43)
9. Performing Operations  (43)
10. Paper Not Otherwise Provided For  (36)
11. Preparation Thereof Not Covered By Subclasses D21c Or D21d  (36)
12. Impregnating Or Coating Of Paper  (36)
13. Pulp Compositions  (36)
14. Treatment Of Finished Paper Not Covered By Class B31 Or Subclass D21g  (36)
15. Nailing Or Stapling Machines In General  (24)
16. Working Or Preserving Wood Or Similar Material  (24)
17. Chemistry  (24)
18. Metallurgy  (24)
19. Chemical Or Physical Treatment Of Cork, Cane, Reed, Straw Orsimilar Materials  (13)
20. Adhesives  (12)
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