FR424163A - Improvements to the mouths of telephone transmitters - Google Patents

Improvements to the mouths of telephone transmitters

Info

Publication number
FR424163A
FR424163A FR424163A FR424163DA FR424163A FR 424163 A FR424163 A FR 424163A FR 424163 A FR424163 A FR 424163A FR 424163D A FR424163D A FR 424163DA FR 424163 A FR424163 A FR 424163A
Authority
FR
France
Prior art keywords
mouths
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
FR424163A
Other languages
French (fr)
Inventor
Peete Basil Clarke
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 FR424163A publication Critical patent/FR424163A/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)
  • Telephone Set Structure (AREA)
FR424163A 1909-12-29 1910-12-28 Improvements to the mouths of telephone transmitters Expired FR424163A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190930352T 1909-12-29

Publications (1)

Publication Number Publication Date
FR424163A true FR424163A (en) 1911-05-06

Family

ID=32447908

Family Applications (1)

Application Number Title Priority Date Filing Date
FR424163A Expired FR424163A (en) 1909-12-29 1910-12-28 Improvements to the mouths of telephone transmitters

Country Status (2)

Country Link
FR (1) FR424163A (en)
GB (1) GB190930352A (en)

Also Published As

Publication number Publication date
GB190930352A (en) 1910-10-06

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