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US2194175A
(en)
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Distortion reducing arrangement
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BE395790A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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US2131293A
(en)
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Sound recording
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US2414666A
(en)
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Photographic sound film noise reduction system
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US2074049A
(en)
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Photographic recording of sound
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BE380737A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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BE395791A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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US1935417A
(en)
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Sound recording
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USRE21293E
(en)
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Sound recording and reproducing |
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US1916510A
(en)
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Electric system for recording and reproducing sound
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US2292166A
(en)
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Electromechanical control system
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BE371364A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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Levinson
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Sound in Motion Pictures |
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MacKenzie
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Sound recording with the light valve |
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US2199606A
(en)
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Sound record
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US1601078A
(en)
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Sound recording
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Kellogg
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A comparison of variable-density and variable-width systems |
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BE475261A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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US1801867A
(en)
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Translating system
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Batsel et al.
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The RCA Sound Recording System |
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US2142573A
(en)
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Light valve
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BE412689A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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Corbin et al.
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Two new Eastman fine-grain sound recording films |
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BE426219A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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BE426514A
(GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
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