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Creation Date 

1. Before 2013  (1)
2. 2013 To 2013  (2)
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Subject 

1. Transporting  (2)
2. Performing Operations  (2)
3. Public Address Systems  (2)
4. Detecting Masses Or Objects  (2)
5. Microstructural Devices Or Systems, E.G. Micromechanicaldevices  (2)
6. Loudspeakers, Microphones, Gramophone Pick-Ups Or Likeacoustic Electromechanical Transducers  (2)
7. Gravitational Measurements  (2)
8. Microstructural Technology  (2)
9. Geophysics  (2)
10. Electric Communication Technique  (2)
11. Deaf-Aid Sets  (2)
12. Investigating Or Analysing Materials By Determining Theirchemical Or Physical Properties  (1)
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Language 

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