BE365744A - - Google Patents

Info

Publication number
BE365744A
BE365744A BE365744DA BE365744A BE 365744 A BE365744 A BE 365744A BE 365744D A BE365744D A BE 365744DA BE 365744 A BE365744 A BE 365744A
Authority
BE
Belgium
Prior art keywords
fork
telephone
rod
induction coil
intensifier
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE365744A publication Critical patent/BE365744A/fr

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
    • H04M1/21—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads
    • H04M1/215—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads by non-intrusive coupling means, e.g. acoustic couplers
    • H04M1/2155—Acoustic coupling

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
BE365744D BE365744A (online.php)

Publications (1)

Publication Number Publication Date
BE365744A true BE365744A (online.php)

Family

ID=37998

Family Applications (1)

Application Number Title Priority Date Filing Date
BE365744D BE365744A (online.php)

Country Status (1)

Country Link
BE (1) BE365744A (online.php)

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