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BE412689A
(de)
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US1989317A
(en)
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Optical system
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US1975929A
(en)
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Sound record and method of making the same
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JPH02143778A
(ja)
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電荷潜像の読取り方式
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US1850467A
(en)
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Monitor method of recording sound on film
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US1993929A
(en)
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Sound recording and reproducing
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FR2532492A1
(fr)
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Circuit amplificateur audio
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US1935417A
(en)
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Sound recording
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US3592534A
(en)
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Audiovisual display system
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US1971446A
(en)
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Home talking movie combination
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BE395791A
(de)
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US2094737A
(en)
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Recording and reproduction of electrical impulses
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US2158268A
(en)
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Voice and music mixer for use in sound recording
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US2171532A
(en)
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Sound-reproducing system and apparatus
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US1844708A
(en)
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Apparatus for the photographic recording and reproducing of sound
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US1854715A
(en)
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Light testing device
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FR1448261A
(fr)
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Procédé et appareil pour la commande au son et notamment pour la synchronisation du son et de l'image dans un dispositif audio-visuel automatique
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USRE21389E
(en)
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Sound recording |
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Miller et al.
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Optical sound recording with a silicon carbide electroluminescent diode |
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US1853812A
(en)
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Sound recording
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US2180014A
(en)
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Sound motion picture reproducing apparatus
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US2010951A
(en)
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Apparatus for recording and reproducing sound
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US1801867A
(en)
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Translating system
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US2097758A
(en)
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Reproduction of sound
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Peck
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Sounds Recorded On" Movie" Film |