FR471031A - Improvements to phonographs - Google Patents

Improvements to phonographs

Info

Publication number
FR471031A
FR471031A FR471031DA FR471031A FR 471031 A FR471031 A FR 471031A FR 471031D A FR471031D A FR 471031DA FR 471031 A FR471031 A FR 471031A
Authority
FR
France
Prior art keywords
phonographs
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)
Inventor
Harry Weir Hess
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR471031A publication Critical patent/FR471031A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR471031D 1914-03-07 1914-03-07 Improvements to phonographs Expired FR471031A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR471031T 1914-03-07

Publications (1)

Publication Number Publication Date
FR471031A true FR471031A (en) 1914-10-10

Family

ID=1509331

Family Applications (1)

Application Number Title Priority Date Filing Date
FR471031D Expired FR471031A (en) 1914-03-07 1914-03-07 Improvements to phonographs

Country Status (1)

Country Link
FR (1) FR471031A (en)

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