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DE490381C
|
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Horn with pipe-like sound conductors plugged into one another
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DE440858C
|
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Membrane for sound boxes, especially of speaking machines
|
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US1657627A
|
|
Sound-recording and sound-reproducing instrument
|
|
US1582473A
|
|
Sound-recording and sound-reproducing instrument
|
|
US1508163A
|
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Needle for talking machines and like apparatus
|
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DE371907C
|
|
Sound box for speaking machines
|
|
DE371908C
|
|
Method and device for the production of composite membranes for sound boxes
|
|
US1524689A
|
|
Diaphragm for sound-recording and sound-reproducing instruments
|
|
US1487013A
|
|
Diaphragm for sound-recording and sound-reproducing instruments
|
|
US1425944A
|
|
Sound recording and reproducing instrument
|
|
US1484471A
|
|
Sound recording and reproducing instrument
|
|
DE367168C
|
|
Articulated connection of the needle bar with the sound box housing with the help of leaf springs
|
|
DE367167C
|
|
Membrane for sound boxes
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CA230249A
|
|
Phonograph diaphragm
|
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CA248684A
|
|
Sound-recording and sound-reproducing instrument
|
|
CA227106A
|
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Diaphragm for sound recording instruments
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