Refine My Results

Creation Date 

1. Before 1959  (42,470)
2. 1959 To 1973  (59,152)
3. 1974 To 1988  (207,510)
4. 1989 To 2004  (358,947)
5. After 2004  (1,194,918)
6. More options 

Subject 

1. Lighting  (615,193)
2. Weapons  (615,193)
3. Blasting  (615,193)
4. Heating  (615,193)
5. Mechanical Engineering  (615,193)
6. Chemistry  (612,368)
7. Metallurgy  (612,368)
8. Climate Change Mitigation Technologies In The Production Orprocessing Of Goods  (576,832)
9. Transporting  (489,472)
10. Performing Operations  (489,472)
11. Climate Change Mitigation Technologies Related Totransportation  (464,772)
12. Electricity  (403,494)
13. Hot-Gas Or Combustion-Product Engine Plants  (274,542)
14. Combustion Engines  (274,542)
15. Climate Change Mitigation Technologies Related To Wastewatertreatment Or Waste Management  (249,088)
16. Basic Electric Elements  (248,776)
17. More options 

Language 

1. English  (1,614,514)
2. Chinese  (429,225)
3. French  (265,686)
4. German  (216,522)
5. Korean  (74,259)
6. Japanese  (54,919)
7. Russian  (39,276)
8. Spanish  (18,901)
9. Portuguese  (12,332)
10. Swedish  (8,533)
11. Italian  (4,963)
12. Dutch  (4,397)
13. Finnish  (4,176)
14. Polish  (3,614)
15. Danish  (3,473)
16. Norwegian  (2,231)
17. Romanian  (2,072)
18. Ukrainian  (1,874)
19. Czech  (1,660)
20. Turkish  (518)
21. More options