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Creation Date 

1. Before 1960  (32,078)
2. 1960 To 1975  (72,032)
3. 1976 To 1991  (288,099)
4. 1992 To 2008  (466,318)
5. After 2008  (1,207,307)
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New Records 

1. New From Last Week  (74,316)
2. New From Last Month  (74,319)
3. New From Last 3 Month  (74,321)
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Resource Type 

1. Patents  (2,069,139)
2. Articles  (938)
3. Reports  (40)
4. Conference Proceedings  (35)
5. Books  (23)
6. Thesises (postgraduate)  (18)
7. magazinearticle  (17)
8. Text Resources  (12)
9. Book Chapters  (6)
10. Newsletter Articles  (2)
11. Other  (1)
12. Reviews  (1)
13. References  (1)
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Subject 

1. Physics  (2,069,169)
2. Measuring  (2,069,139)
3. Measuring Magnetic Variables  (1,475,561)
4. Measuring Electric Variables  (1,475,561)
5. Electricity  (575,012)
6. Tariff Metering Apparatus  (519,690)
7. Arrangements For Measuring Two Or More Variables Not Coveredin A Single Other Subclass  (519,690)
8. Measuring Not Specially Adapted For A Specific Variable  (519,690)
9. Measuring Or Testing Not Otherwise Provided For  (519,690)
10. Basic Electric Elements  (269,352)
11. Transporting  (173,006)
12. Performing Operations  (173,006)
13. Conversion Or Distribution Of Electric Power  (168,757)
14. Generation  (168,757)
15. Counting  (166,325)
16. Calculating  (166,324)
17. Computing  (166,324)
18. Controlling  (150,642)
19. Regulating  (150,642)
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Databases 

1. esp@cenet  (2,069,139)
2. ProQuest Central  (602)
3. Education Resources Information Center (ERIC)  (284)
4. MEDLINE  (259)
5. DOAJ Directory of Open Access Journals  (249)
6. ROAD  (213)
7. Open Access: PubMed Central  (161)
8. Geneva Foundation Free Medical Journals at publisher websites  (157)
9. ProQuest One Psychology  (116)
10. SpringerOpen  (79)
11. ERIC - Full Text Only (Discovery)  (68)
12. RePEc  (42)
13. JSTOR Early Journal Content Free  (39)
14. Public Library of Science（OA）  (35)
15. Hyper Article en Ligne (HAL) (Open Access)  (26)
16. IEEE Open Access Journals  (23)
17. Coronavirus Research Database  (21)
18. Wiley-Blackwell Open Access Collection  (15)
19. SWEPUB Freely available online  (13)
20. HighWire Press (Free Journals)  (12)
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Language 

1. English  (1,720,489)
2. Chinese  (649,881)
3. French  (233,544)
4. German  (232,309)
5. Korean  (82,681)
6. Japanese  (61,737)
7. Russian  (26,636)
8. Spanish  (13,141)
9. Portuguese  (7,584)
10. Italian  (6,644)
11. Swedish  (5,299)
12. Polish  (3,870)
13. Finnish  (3,163)
14. Dutch  (2,784)
15. Danish  (2,538)
16. Norwegian  (2,202)
17. Romanian  (1,626)
18. Ukrainian  (1,297)
19. Czech  (848)
20. Hungarian  (436)
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Journal Title 

1. 2006 International Conference Of The Ieee Engineering In Medicine And Biology Society  (7)
2. Annual International Conference Of The Ieee Engineering In Medicine And Biology Society. Ieee Engineering In Medicine And Biology Society. Annual International Conference  (9)
3. Conference Proceedings  (16)
4. Econometrica  (12)
5. Ieee Access  (13)
6. Ieee Transactions On Biomedical Engineering  (22)
7. Ieee Transactions On Software Engineering  (27)
8. Journal Of Econometrics  (21)
9. Journal Of The American Statistical Association  (35)
10. Plos One  (31)
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