Refine My Results

Creation Date 

1. Before 1960  (4,840)
2. 1960 To 1975  (31,663)
3. 1976 To 1991  (97,520)
4. 1992 To 2008  (180,177)
5. After 2008  (395,941)
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New Records 

1. New From Last Month  (21,888)
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Subject 

1. Conversion Or Distribution Of Electric Power  (629,429)
2. Generation  (629,429)
3. Circuit Arrangements Or Systems For Supplying Or Distributingelectric Power  (193,045)
4. Systems For Storing Electric Energy  (193,045)
5. Semiconductor Devices  (168,292)
6. Electric Solid State Devices Not Otherwise Provided For  (168,292)
7. Line Connectors  (147,012)
8. Current Collectors  (147,012)
9. Transporting  (143,220)
10. Performing Operations  (143,220)
11. Processes Or Means, E.G. Batteries, For The Direct Conversionof Chemical Into Electrical Energy  (142,559)
12. Physics  (123,750)
13. Installation Of Electric Cables Or Lines, Or Of Combinedoptical And Electric Cables Or Lines  (122,810)
14. Emergency Protective Devices  (94,314)
15. Selectors  (94,314)
16. Electric Switches  (94,314)
17. Relays  (94,314)
18. Inductances  (93,364)
19. More options 

Language 

1. English  (585,975)
2. Chinese  (123,931)
3. French  (107,843)
4. German  (98,798)
5. Japanese  (56,901)
6. Korean  (35,773)
7. Spanish  (8,112)
8. Portuguese  (4,175)
9. Russian  (3,560)
10. Italian  (3,037)
11. Swedish  (2,540)
12. Danish  (1,510)
13. Finnish  (1,328)
14. Norwegian  (1,302)
15. Dutch  (1,279)
16. Polish  (1,242)
17. Czech  (424)
18. Romanian  (321)
19. Turkish  (265)
20. Hungarian  (264)
21. More options