FR650504A - Improvements to sound recording and reproduction systems - Google Patents

Improvements to sound recording and reproduction systems

Info

Publication number
FR650504A
FR650504A FR650504DA FR650504A FR 650504 A FR650504 A FR 650504A FR 650504D A FR650504D A FR 650504DA FR 650504 A FR650504 A FR 650504A
Authority
FR
France
Prior art keywords
sound recording
reproduction systems
reproduction
systems
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.)
Electrical Research Products Inc
Original Assignee
Electrical Research Products Inc
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 Electrical Research Products Inc filed Critical Electrical Research Products Inc
Application granted granted Critical
Publication of FR650504A publication Critical patent/FR650504A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B31/00—Associated working of cameras or projectors with sound-recording or sound-reproducing means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR650504D 1927-05-14 1928-03-06 Improvements to sound recording and reproduction systems Expired FR650504A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US650504XA 1927-05-14 1927-05-14

Publications (1)

Publication Number Publication Date
FR650504A true FR650504A (en) 1929-01-10

Family

ID=22060018

Family Applications (1)

Application Number Title Priority Date Filing Date
FR650504D Expired FR650504A (en) 1927-05-14 1928-03-06 Improvements to sound recording and reproduction systems

Country Status (1)

Country Link
FR (1) FR650504A (en)

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