Inductor dynamic' moving iron loudspeaker
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License'Inductor dynamic' moving iron loudspeaker (Pat. No
Science Museum Group
The Board of Trustees of the Science Museum
'Inductor dynamic' moving iron loudspeaker (Pat. No. 238,310 of 1924-5)
Details
- Category:
- Radio Communication
- Object Number:
- 1933-139
- type:
- loudspeaker
- credit:
- Voigt, P.G.A.H.
