FR570775A - Improvements made to graphophones - Google Patents

Improvements made to graphophones

Info

Publication number
FR570775A
FR570775A FR570775DA FR570775A FR 570775 A FR570775 A FR 570775A FR 570775D A FR570775D A FR 570775DA FR 570775 A FR570775 A FR 570775A
Authority
FR
France
Prior art keywords
graphophones
improvements made
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.)
COLUMBIA GRAPHOPHONE CO Ltd
Original Assignee
COLUMBIA GRAPHOPHONE CO Ltd
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 COLUMBIA GRAPHOPHONE CO Ltd filed Critical COLUMBIA GRAPHOPHONE CO Ltd
Application granted granted Critical
Publication of FR570775A publication Critical patent/FR570775A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K13/00—Cones, diaphragms, or the like, for emitting or receiving sound in general

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
FR570775D 1923-05-30 1923-09-12 Improvements made to graphophones Expired FR570775A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB570775X 1923-05-30

Publications (1)

Publication Number Publication Date
FR570775A true FR570775A (en) 1924-05-07

Family

ID=10478305

Family Applications (1)

Application Number Title Priority Date Filing Date
FR570775D Expired FR570775A (en) 1923-05-30 1923-09-12 Improvements made to graphophones

Country Status (1)

Country Link
FR (1) FR570775A (en)

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