DE90445C - - Google Patents

Info

Publication number
DE90445C
DE90445C DENDAT90445D DE90445DA DE90445C DE 90445 C DE90445 C DE 90445C DE NDAT90445 D DENDAT90445 D DE NDAT90445D DE 90445D A DE90445D A DE 90445DA DE 90445 C DE90445 C DE 90445C
Authority
DE
Germany
Prior art keywords
record
under
vibrations
microphone
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
DENDAT90445D
Other languages
German (de)
English (en)
Publication of DE90445C publication Critical patent/DE90445C/de
Active legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/28—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP with meter at substation or with calculation of charges at terminal
    • H04M15/30—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP with meter at substation or with calculation of charges at terminal the meter or calculation of charges not being controlled from an exchange

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
DENDAT90445D Active DE90445C (enrdf_load_stackoverflow)

Publications (1)

Publication Number Publication Date
DE90445C true DE90445C (enrdf_load_stackoverflow)

Family

ID=362164

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT90445D Active DE90445C (enrdf_load_stackoverflow)

Country Status (1)

Country Link
DE (1) DE90445C (enrdf_load_stackoverflow)

Similar Documents

Publication Publication Date Title
DE90445C (enrdf_load_stackoverflow)
DE394884C (de) Vorrichtung zum Aufzeichnen von Lauten auf elektromagnetischem Weg
DE535973C (de) Schaltungsanordnung fuer Schrittschaltwerke, insbesondere in Fernsprechanlagen
DE155583C (enrdf_load_stackoverflow)
DE30288C (de) Telephon-Uebertragungs-System
DE268937C (enrdf_load_stackoverflow)
DE85717C (enrdf_load_stackoverflow)
DE624996C (de) Rueckmelder fuer Telephonstellen
DE225460C (enrdf_load_stackoverflow)
DE77501C (de) Einrichtung zur Vorbereitung der Telegramme für selbsttätige Apparate
DE55776C (de) Elektrischer Uebertragungsapparat
DE15635C (de) Neuerung an Telephonen
DE229964C (enrdf_load_stackoverflow)
DE27292C (de) Neuerungen an elektrischen Telephonen
DE108713C (enrdf_load_stackoverflow)
DE28930C (de) Signalvorrichtung für Telephone mit Hufeisenmagnet und für Haustelegraphen
DE169902C (enrdf_load_stackoverflow)
DE25329C (de) Neuerung an Drucktelegraphen
DE179669C (enrdf_load_stackoverflow)
DE610040C (de) Schaltungsanordnung fuer Fernsprechanlagen mit Selbstbelastungseinrichtungen, insbesondere fuer Muenzfernsprecher
DE655796C (de) Schaltungsanordnung fuer Fernmeldeanlagen
DE196447C (enrdf_load_stackoverflow)
DE112409C (enrdf_load_stackoverflow)
DE178068C (enrdf_load_stackoverflow)
DE10021C (de) Neuerungen an Telephonen