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Creation Date 

1. Before 2010  (2)
2. 2010 To 2011  (2)
3. 2012 To 2014  (3)
4. 2015 To 2017  (5)
5. After 2017  (6)
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Subject 

1. Physics  (12)
2. Measuring  (11)
3. Testing  (11)
4. Electricity  (10)
5. Investigating Or Analysing Materials By Determining Theirchemical Or Physical Properties  (8)
6. Thermally-Sensitive Elements Not Otherwise Provided For  (5)
7. Measuring Temperature  (5)
8. Basic Electric Elements  (5)
9. Measuring Quantity Of Heat  (5)
10. Transmission Systems For Measured Values, Control Or Similarsignals  (4)
11. Signalling  (4)
12. Electric Communication Technique  (4)
13. Semiconductor Devices  (3)
14. Conversion Or Distribution Of Electric Power  (3)
15. Generation  (3)
16. Electric Solid State Devices Not Otherwise Provided For  (3)
17. Cables  (2)
18. Arrangements For Measuring Two Or More Variables Not Coveredin A Single Other Subclass  (2)
19. Alarm Systems  (2)
20. Apparatus Therefor  (2)
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Language 

1. English  (6)
2. French  (2)
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