FR489694A - Transmetteur téléphonique - Google Patents

Transmetteur téléphonique

Info

Publication number
FR489694A
FR489694A FR489694A FR489694DA FR489694A FR 489694 A FR489694 A FR 489694A FR 489694 A FR489694 A FR 489694A FR 489694D A FR489694D A FR 489694DA FR 489694 A FR489694 A FR 489694A
Authority
FR
France
Prior art keywords
telephone transmitter
telephone
transmitter
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
FR489694A
Other languages
English (en)
Inventor
Stephen Case Porter
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 FR489694A publication Critical patent/FR489694A/fr
Expired 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)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
FR489694A 1915-06-12 1916-06-10 Transmetteur téléphonique Expired FR489694A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US100689XA 1915-06-12 1915-06-12

Publications (1)

Publication Number Publication Date
FR489694A true FR489694A (fr) 1919-03-01

Family

ID=32505200

Family Applications (1)

Application Number Title Priority Date Filing Date
FR489694A Expired FR489694A (fr) 1915-06-12 1916-06-10 Transmetteur téléphonique

Country Status (2)

Country Link
FR (1) FR489694A (fr)
GB (1) GB100689A (fr)

Also Published As

Publication number Publication date
GB100689A (en) 1917-06-12

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