Refine My Results

Creation Date 

1. Before 1960  (31,273)
2. 1960 To 1975  (62,337)
3. 1976 To 1991  (171,832)
4. 1992 To 2008  (187,451)
5. After 2008  (448,985)
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Subject 

1. Systems For Controlling Or Regulating Non-Electric Variables  (678,421)
2. Electricity  (215,306)
3. Systems For Regulating Electric Or Magnetic Variables  (196,339)
4. Transporting  (185,708)
5. Performing Operations  (185,708)
6. Measuring  (146,250)
7. Testing  (146,250)
8. Lighting  (142,230)
9. Weapons  (142,230)
10. Blasting  (142,230)
11. Heating  (142,230)
12. Mechanical Engineering  (142,230)
13. Conversion Or Distribution Of Electric Power  (104,551)
14. Generation  (104,551)
15. Control Or Regulating Systems In General  (87,961)
16. Functional Elements Of Such Systems  (87,961)
17. Monitoring Or Testing Arrangements For Such Systems Orelements  (87,961)
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Language 

1. English  (753,768)
2. Chinese  (198,046)
3. French  (114,207)
4. German  (105,230)
5. Korean  (28,319)
6. Japanese  (22,514)
7. Russian  (12,529)
8. Spanish  (10,462)
9. Portuguese  (4,796)
10. Italian  (4,387)
11. Swedish  (4,317)
12. Danish  (2,489)
13. Dutch  (2,328)
14. Finnish  (2,114)
15. Polish  (1,710)
16. Norwegian  (1,505)
17. Ukrainian  (598)
18. Romanian  (549)
19. Czech  (466)
20. Turkish  (317)
21. More options