Refine My Results

Creation Date 

1. Before 1960  (13,770)
2. 1960 To 1975  (73,644)
3. 1976 To 1991  (289,370)
4. 1992 To 2008  (741,838)
5. After 2008  (1,504,473)
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New Records 

1. New From Last Month  (8,967)
2. New From Last 3 Month  (92,333)
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Subject 

1. Basic Electric Elements  (1,362,806)
2. Vehicles In General  (591,471)
3. Physics  (588,217)
4. Semiconductor Devices  (579,083)
5. Electric Solid State Devices Not Otherwise Provided For  (579,083)
6. Conversion Or Distribution Of Electric Power  (551,442)
7. Generation  (551,442)
8. Electric Techniques Not Otherwise Provided For  (478,754)
9. Electric Communication Technique  (470,418)
10. Chemistry  (378,307)
11. Metallurgy  (378,307)
12. Manufacture Of Assemblages Of Electrical Components  (332,683)
13. Printed Circuits  (332,683)
14. Casings Or Constructional Details Of Electric Apparatus  (332,683)
15. Processes Or Means, E.G. Batteries, For The Direct Conversionof Chemical Into Electrical Energy  (287,782)
16. Pictorial Communication, E.G. Television  (287,360)
17. Lining Machines  (260,469)
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Language 

1. English  (2,193,627)
2. Chinese  (554,489)
3. French  (348,437)
4. German  (313,255)
5. Japanese  (216,277)
6. Korean  (143,267)
7. Spanish  (19,896)
8. Portuguese  (10,270)
9. Russian  (9,116)
10. Italian  (7,623)
11. Swedish  (6,379)
12. Dutch  (3,897)
13. Danish  (3,845)
14. Finnish  (3,619)
15. Polish  (3,035)
16. Norwegian  (2,618)
17. Czech  (962)
18. Hungarian  (791)
19. Romanian  (709)
20. Ukrainian  (543)
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