Refine My Results

Creation Date 

1. Before 1960  (5,297)
2. 1960 To 1975  (18,562)
3. 1976 To 1991  (86,109)
4. 1992 To 2008  (257,984)
5. After 2008  (321,662)
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New Records 

1. New From Last Month  (1,232)
2. New From Last 3 Month  (14,213)
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Subject 

1. Apparatus Specially Adapted Therefor  (681,909)
2. Materials Therefor  (681,893)
3. Originals Therefor  (681,893)
4. Electricity  (327,032)
5. Basic Electric Elements  (284,004)
6. Semiconductor Devices  (268,079)
7. Electric Solid State Devices Not Otherwise Provided For  (268,079)
8. Chemistry  (163,855)
9. Metallurgy  (163,855)
10. Transporting  (117,390)
11. Performing Operations  (117,390)
12. Compositions Based Thereon  (106,188)
13. Their Preparation Or Chemical Working-Up  (106,188)
14. Organic Macromolecular Compounds  (106,188)
15. Optics  (86,892)
16. More options 

Language 

1. English  (600,199)
2. Chinese  (106,364)
3. French  (84,975)
4. German  (72,413)
5. Korean  (58,443)
6. Japanese  (47,622)
7. Spanish  (2,474)
8. Dutch  (1,999)
9. Italian  (1,545)
10. Portuguese  (1,433)
11. Russian  (977)
12. Swedish  (939)
13. Danish  (930)
14. Finnish  (866)
15. Norwegian  (457)
16. Polish  (175)
17. Hebrew  (100)
18. Czech  (65)
19. Ukrainian  (44)
20. Romanian  (41)
21. More options