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Creation Date 

1. Before 2007  (5)
2. 2007 To 2009  (68)
3. 2010 To 2012  (81)
4. 2013 To 2016  (38)
5. After 2016  (8)
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Subject 

1. Processes Or Means, E.G. Batteries, For The Direct Conversionof Chemical Into Electrical Energy  (177)
2. Basic Electric Elements  (177)
3. Electricity  (177)
4. Technical Subjects Covered By Former Uspc Cross-Reference Art Collections [xracs] And Digests  (62)
5. Technologies Or Applications For Mitigation Or Adaptation Againstclimate Change  (62)
6. General Tagging Of Cross-Sectional Technologies Spanning Over Several Sections Of The Ipc  (62)
7. General Tagging Of New Technological Developments  (62)
8. Climate Change Mitigation Technologies Related Totransportation  (51)
9. Transporting  (15)
10. Electrodynamic Brake Systems For Vehicles, In General  (15)
11. Performing Operations  (15)
12. Electric Equipment Or Propulsion Of Electrically-Propelledvehicles  (15)
13. Vehicles In General  (15)
14. Magnetic Suspension Or Levitation For Vehicles  (15)
15. Physics  (10)
16. Measuring  (8)
17. Testing  (8)
18. Measuring Force, Stress, Torque, Work, Mechanical Power,mechanical Efficiency, Or Fluid Pressure  (5)
19. Testing Structures Or Apparatus Not Otherwise Provided For  (2)
20. Testing Static Or Dynamic Balance Of Machines Orstructures  (2)
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Databases 

1. esp@cenet  (178)
2. USPTO Issued Patents  (21)
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Language 

1. English  (140)
2. German  (61)
3. Chinese  (28)
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