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Creation Date 

1. Before 1983  (2,079)
2. 1983 To 1991  (2,267)
3. 1992 To 2000  (3,730)
4. 2001 To 2010  (6,211)
5. After 2010  (12,130)
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Subject 

1. Technical Subjects Covered By Former Uspc  (14,888)
2. Technologies Or Applications For Mitigation Or Adaptation Againstclimate Change  (12,303)
3. Technical Subjects Covered By Former Us Classification  (11,925)
4. Transporting  (11,075)
5. Performing Operations  (11,075)
6. Chemistry  (8,790)
7. Metallurgy  (8,790)
8. Lighting  (8,568)
9. Weapons  (8,568)
10. Blasting  (8,568)
11. Heating  (8,568)
12. Mechanical Engineering  (8,568)
13. Technical Subjects Covered By Former Uspc Cross-Reference Artcollections [xracs] And Digests  (3,834)
14. Climate Change Mitigation Technologies In The Production Orprocessing Of Goods  (3,640)
15. Engineering Elements And Units  (3,196)
16. Thermal Insulation In General  (3,196)
17. General Measures For Producing And Maintaining Effectivefunctioning Of Machines Or Installations  (3,196)
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Language 

1. English  (1,222)
2. French  (261)
3. Spanish  (1)
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