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Creation Date 

1. Before 1978  (33)
2. 1978 To 1983  (41)
3. 1984 To 1989  (44)
4. 1990 To 1996  (72)
5. After 1996  (28)
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New Records 

1. New From Last Month  (1)
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Subject 

1. Textiles  (189)
2. Production Of Cellulose  (175)
3. Paper-Making  (175)
4. Apparatus Therefor  (124)
5. Regeneration Of Pulping Liquors  (123)
6. Production Of Cellulose By Removing Non-Cellulose Substancesfrom Cellulose-Containing Materials  (123)
7. Transporting  (52)
8. Performing Operations  (52)
9. Chemistry  (48)
10. Metallurgy  (48)
11. Paper Not Otherwise Provided For  (35)
12. Preparation Thereof Not Covered By Subclasses D21c Or D21d  (35)
13. Impregnating Or Coating Of Paper  (35)
14. Pulp Compositions  (35)
15. Treatment Of Finished Paper Not Covered By Class B31 Or Subclass D21g  (35)
16. Fibrous Raw Materials Or Their Mechanical Treatment  (27)
17. Physical Or Chemical Processes Or Apparatus In General  (23)
18. Methods Of Producing Paper Thereon  (19)
19. Human Necessities  (19)
20. Paper-Making Machines  (19)
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Language 

1. Finnish  (103)
2. English  (15)
3. French  (1)
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