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Rice et al.
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Notes on the development of a new type of hornless loud speaker |
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US4550430A
(en)
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Sound reproducing system utilizing motional feedback and an improved integrated magnetic structure
|
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US1827051A
(en)
|
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Recording and reproducing system and apparatus
|
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GB227391A
(en)
|
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Improvements in or relating to electric apparatus for the reproduction of recorded sounds
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BE358204A
(enrdf_load_stackoverflow)
|
|
|
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JP2000078689A
(ja)
|
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電気・音響変換装置
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KR100401675B1
(ko)
|
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주파수 특성 조정부재가 구비된 스피커
|
|
US1915804A
(en)
|
|
Electrodynamic pickup
|
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US1728278A
(en)
|
|
Electromagnetic translating device
|
|
US1760647A
(en)
|
|
Electrical pick-up
|
|
US2213936A
(en)
|
|
Electrodynamic pickup
|
|
US1531252A
(en)
|
|
Electrical reproducer for phonograph records
|
|
US1759967A
(en)
|
|
Electric sound transmitter
|
|
US1557529A
(en)
|
|
Electrical reproducer for phonographs
|
|
US3219764A
(en)
|
|
Stylus assembly for a phonograph pickup cartridge
|
|
US2383994A
(en)
|
|
Phonograph pickup
|
|
US1771323A
(en)
|
|
Attachment for electric amplifiers
|
|
US2038687A
(en)
|
|
Acoustic translating device
|
|
US1604344A
(en)
|
|
Phonographic apparatus and method therefor
|
|
US1812957A
(en)
|
|
Electrically operating sound recorder and reproducer
|
|
US1626088A
(en)
|
|
Apparatus for sound reproductions
|
|
US1724099A
(en)
|
|
Apparatus for sound reproduction
|
|
US1741226A
(en)
|
|
of east orange |
|
US2531242A
(en)
|
|
Electrodynamic phonograph pickup
|
|
US1672063A
(en)
|
|
Combined mechanical and electrical reproducer and transmitter
|