FR323469A - Combined phonetic telephone and telegraph system - Google Patents

Combined phonetic telephone and telegraph system

Info

Publication number
FR323469A
FR323469A FR323469DA FR323469A FR 323469 A FR323469 A FR 323469A FR 323469D A FR323469D A FR 323469DA FR 323469 A FR323469 A FR 323469A
Authority
FR
France
Prior art keywords
telephone
telegraph system
combined phonetic
phonetic
combined
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)
Inventor
Norden Carl
Andersson August Hjalmar
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR323469A publication Critical patent/FR323469A/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
    • H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR323469D 1902-08-04 1902-08-04 Combined phonetic telephone and telegraph system Expired FR323469A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR323469T 1902-08-04

Publications (1)

Publication Number Publication Date
FR323469A true FR323469A (en) 1903-03-06

Family

ID=1373758

Family Applications (1)

Application Number Title Priority Date Filing Date
FR323469D Expired FR323469A (en) 1902-08-04 1902-08-04 Combined phonetic telephone and telegraph system

Country Status (1)

Country Link
FR (1) FR323469A (en)

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