|
US1854716A
|
|
Sound instrument
|
|
US1693727A
|
|
Acoustic diaphragm
|
|
US1692800A
|
|
Acoustic diaphragm
|
|
US1560303A
|
|
Double earpiece
|
|
US1425047A
|
|
Receiver earpiece
|
|
US1419513A
|
|
Mouthpiece
|
|
US1395864A
|
|
Ear-appliance mounting
|
|
US1341280A
|
|
Telephone hand set or hand piece
|
|
US1267587A
|
|
Sound-reproducing appliance.
|
|
US1218799A
|
|
Phonograph recorder and reproducer.
|
|
US1270861A
|
|
Combined telegraph and telephone instrument.
|
|
US1272843A
|
|
Combined sound-reproducer and lighting-fixture.
|
|
US1236103A
|
|
Telephone instrument.
|
|
US1060851A
|
|
Passenger-driver telephone signal system for vehicles.
|
|
US1025992A
|
|
Transmitter for telephonic or audiphonic systems.
|
|
US791573A
|
|
Audiphone instruction apparatus or set.
|
|
US771321A
|
|
Gas-stove.
|
|
US1272993A
|
|
Speaking and signaling apparatus.
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