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Creation Date 

1. Before 1961  (47)
2. 1961 To 1975  (1,646)
3. 1976 To 1989  (7,120)
4. 1990 To 2004  (2,011)
5. After 2004  (634)
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Subject 

1. Technical Subjects Covered By Former Uspc  (7,512)
2. Chemistry  (4,453)
3. Metallurgy  (4,453)
4. Technologies Or Applications For Mitigation Or Adaptation Againstclimate Change  (4,397)
5. Transporting  (4,294)
6. Performing Operations  (4,294)
7. Technical Subjects Covered By Former Uspc Cross-Reference Artcollections [xracs] And Digests  (4,151)
8. Technical Subjects Covered By Former Us Classification  (4,026)
9. Lighting  (2,499)
10. Weapons  (2,499)
11. Blasting  (2,499)
12. Heating  (2,499)
13. Mechanical Engineering  (2,499)
14. Physics  (1,707)
15. Electricity  (1,618)
16. Climate Change Mitigation Technologies In The Production Orprocessing Of Goods  (1,607)
17. Physical Or Chemical Processes Or Apparatus In General  (1,376)
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Language 

1. English  (1,105)
2. French  (55)
3. German  (1)
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