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FR388174A - Improvements to telephone transmitters - Google Patents

Improvements to telephone transmitters

Info

Publication number
FR388174A
FR388174A FR388174DA FR388174A FR 388174 A FR388174 A FR 388174A FR 388174D A FR388174D A FR 388174DA FR 388174 A FR388174 A FR 388174A
Authority
FR
France
Prior art keywords
telephone transmitters
transmitters
telephone
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
Edward Francis Hutton
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 FR388174A publication Critical patent/FR388174A/en
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
    • H04M1/19—Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Mouthpieces or receivers specially adapted therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR388174D 1908-03-14 1908-03-14 Improvements to telephone transmitters Expired FR388174A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR388174T 1908-03-14

Publications (1)

Publication Number Publication Date
FR388174A true FR388174A (en) 1908-08-04

Family

ID=1433864

Family Applications (1)

Application Number Title Priority Date Filing Date
FR388174D Expired FR388174A (en) 1908-03-14 1908-03-14 Improvements to telephone transmitters

Country Status (1)

Country Link
FR (1) FR388174A (en)

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