FR703308A - Improvements to sound reproduction devices - Google Patents

Improvements to sound reproduction devices

Info

Publication number
FR703308A
FR703308A FR703308DA FR703308A FR 703308 A FR703308 A FR 703308A FR 703308D A FR703308D A FR 703308DA FR 703308 A FR703308 A FR 703308A
Authority
FR
France
Prior art keywords
sound reproduction
reproduction devices
devices
sound
reproduction
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.)
Sparks Withington Co
Original Assignee
Sparks Withington Co
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 Sparks Withington Co filed Critical Sparks Withington Co
Application granted granted Critical
Publication of FR703308A publication Critical patent/FR703308A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/20—Circuits for coupling gramophone pick-up, recorder output, or microphone to receiver

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Amplifiers (AREA)
  • Dc-Dc Converters (AREA)
FR703308D 1929-10-05 1930-10-04 Improvements to sound reproduction devices Expired FR703308A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US398078A US1959111A (en) 1929-10-05 1929-10-05 Radio phonograph amplifier

Publications (1)

Publication Number Publication Date
FR703308A true FR703308A (en) 1931-04-28

Family

ID=23573901

Family Applications (1)

Application Number Title Priority Date Filing Date
FR703308D Expired FR703308A (en) 1929-10-05 1930-10-04 Improvements to sound reproduction devices

Country Status (3)

Country Link
US (1) US1959111A (en)
FR (1) FR703308A (en)
GB (1) GB362554A (en)

Also Published As

Publication number Publication date
US1959111A (en) 1934-05-15
GB362554A (en) 1931-12-10

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