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Creation Date 

1. Before 1998  (111)
2. 1998 To 2002  (79)
3. 2003 To 2007  (404)
4. 2008 To 2013  (1,134)
5. After 2013  (1,887)
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Subject 

1. Chemistry  (1,689)
2. Metallurgy  (1,689)
3. Lighting  (1,275)
4. Weapons  (1,275)
5. Blasting  (1,275)
6. Heating  (1,275)
7. Mechanical Engineering  (1,275)
8. Transporting  (1,071)
9. Performing Operations  (1,071)
10. Climate Change Mitigation Technologies Related To Wastewatertreatment Or Waste Management  (1,036)
11. Climate Change Mitigation Technologies In The Production Orprocessing Of Goods  (870)
12. Climate Change Mitigation Technologies Related Totransportation  (477)
13. Machines Or Engines For Liquids  (454)
14. Producing Mechanical Power  (454)
15. Wind, Spring Weight And Miscellaneous Motors  (454)
16. Or A Reactive Propulsive Thrust, Not Otherwise Provided For  (454)
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