Refine My Results

Creation Date 

1. Before 1960  (1,372)
2. 1960 To 1975  (2,225)
3. 1976 To 1991  (7,076)
4. 1992 To 2008  (30,250)
5. After 2008  (42,880)
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New Records 

1. New From Last Week  (27)
2. New From Last Month  (1,296)
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Subject 

1. Physics  (57,719)
2. Measuring  (30,360)
3. Testing  (30,360)
4. Electricity  (21,868)
5. Measuring Magnetic Variables  (18,228)
6. Measuring Electric Variables  (18,228)
7. Controlling  (14,711)
8. Regulating  (14,711)
9. Transporting  (13,249)
10. Performing Operations  (13,249)
11. Calculating  (11,790)
12. Computing  (11,790)
13. Counting  (11,790)
14. Lighting  (10,143)
15. Weapons  (10,143)
16. Blasting  (10,143)
17. Heating  (10,143)
18. Mechanical Engineering  (10,143)
19. Systems For Controlling Or Regulating Non-Electric Variables  (9,303)
20. Electric Digital Data Processing  (8,315)
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Databases 

1. esp@cenet  (79,411)
2. USPTO Issued Patents  (2,529)
3. USPTO Published Applications  (1,892)
4. Fraunhofer-ePrints  (61)
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Language 

1. English  (71,354)
2. German  (24,520)
3. French  (19,897)
4. Chinese  (14,183)
5. Korean  (1,846)
6. Spanish  (1,846)
7. Japanese  (934)
8. Portuguese  (750)
9. Russian  (578)
10. Italian  (417)
11. Swedish  (273)
12. Danish  (251)
13. Dutch  (219)
14. Polish  (211)
15. Norwegian  (158)
16. Finnish  (132)
17. Romanian  (86)
18. Czech  (47)
19. Slovenian  (42)
20. Hebrew  (39)
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