4. Electrical audio signal processing systems and devices
  5. Electro-acoustic audio transducer
  6. Having acoustic wave modifying structure

Robert J. Spear

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Firing cap composition containing lead styphnate

Explosive and thermic compositions or charges – Containing nitrated metallo-organic compound – Nitrated organic compound of lead
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Transmission line for planar waves

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having acoustic wave modifying structure
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Profile ID: LFUS-PAI-P-1305400

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