FR948997A - Improvements in sound wave recording processes and apparatus - Google Patents

Improvements in sound wave recording processes and apparatus

Info

Publication number
FR948997A
FR948997A FR948997DA FR948997A FR 948997 A FR948997 A FR 948997A FR 948997D A FR948997D A FR 948997DA FR 948997 A FR948997 A FR 948997A
Authority
FR
France
Prior art keywords
sound wave
wave recording
recording processes
processes
sound
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SoundScriber Corp
Original Assignee
SoundScriber Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SoundScriber Corp filed Critical SoundScriber Corp
Application granted granted Critical
Publication of FR948997A publication Critical patent/FR948997A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
FR948997D 1939-06-12 1947-07-04 Improvements in sound wave recording processes and apparatus Expired FR948997A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US948997XA 1939-06-12 1939-06-12

Publications (1)

Publication Number Publication Date
FR948997A true FR948997A (en) 1949-08-17

Family

ID=22247805

Family Applications (1)

Application Number Title Priority Date Filing Date
FR948997D Expired FR948997A (en) 1939-06-12 1947-07-04 Improvements in sound wave recording processes and apparatus

Country Status (1)

Country Link
FR (1) FR948997A (en)

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