DE139468C - - Google Patents

Info

Publication number
DE139468C
DE139468C DENDAT139468D DE139468DA DE139468C DE 139468 C DE139468 C DE 139468C DE NDAT139468 D DENDAT139468 D DE NDAT139468D DE 139468D A DE139468D A DE 139468DA DE 139468 C DE139468 C DE 139468C
Authority
DE
Germany
Prior art keywords
side walls
housing
microphone
hand lever
sound waves
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.)
Active
Application number
DENDAT139468D
Other languages
German (de)
English (en)
Publication of DE139468C publication Critical patent/DE139468C/de
Active legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/04—Supports for telephone transmitters or receivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
DENDAT139468D Active DE139468C (index.php)

Publications (1)

Publication Number Publication Date
DE139468C true DE139468C (index.php)

Family

ID=407211

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT139468D Active DE139468C (index.php)

Country Status (1)

Country Link
DE (1) DE139468C (index.php)

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