FR797285A - Improvements to membranes for hearing devices - Google Patents

Improvements to membranes for hearing devices

Info

Publication number
FR797285A
FR797285A FR797285DA FR797285A FR 797285 A FR797285 A FR 797285A FR 797285D A FR797285D A FR 797285DA FR 797285 A FR797285 A FR 797285A
Authority
FR
France
Prior art keywords
membranes
hearing devices
hearing
devices
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Application granted granted Critical
Publication of FR797285A publication Critical patent/FR797285A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
FR797285D 1934-11-06 1935-11-04 Improvements to membranes for hearing devices Expired FR797285A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2102150X 1934-11-06

Publications (1)

Publication Number Publication Date
FR797285A true FR797285A (en) 1936-04-23

Family

ID=7985018

Family Applications (1)

Application Number Title Priority Date Filing Date
FR797285D Expired FR797285A (en) 1934-11-06 1935-11-04 Improvements to membranes for hearing devices

Country Status (2)

Country Link
US (1) US2102150A (en)
FR (1) FR797285A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2733774A (en) * 1956-02-07 Pessel

Also Published As

Publication number Publication date
US2102150A (en) 1937-12-14

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