DE190105C - - Google Patents

Info

Publication number
DE190105C
DE190105C DENDAT190105D DE190105DA DE190105C DE 190105 C DE190105 C DE 190105C DE NDAT190105 D DENDAT190105 D DE NDAT190105D DE 190105D A DE190105D A DE 190105DA DE 190105 C DE190105 C DE 190105C
Authority
DE
Germany
Prior art keywords
horn
telephone
microphone
streets
conically
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
DENDAT190105D
Other languages
German (de)
English (en)
Publication of DE190105C publication Critical patent/DE190105C/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
    • H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Alarm Systems (AREA)
DENDAT190105D Active DE190105C (Direct)

Publications (1)

Publication Number Publication Date
DE190105C true DE190105C (Direct)

Family

ID=453591

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT190105D Active DE190105C (Direct)

Country Status (1)

Country Link
DE (1) DE190105C (Direct)

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