FR452068A - Téléphone porte-voix - Google Patents

Téléphone porte-voix

Info

Publication number
FR452068A
FR452068A FR452068DA FR452068A FR 452068 A FR452068 A FR 452068A FR 452068D A FR452068D A FR 452068DA FR 452068 A FR452068 A FR 452068A
Authority
FR
France
Prior art keywords
megaphone
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
English (en)
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.)
MAURICE LE LAS
Original Assignee
MAURICE LE LAS
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 MAURICE LE LAS filed Critical MAURICE LE LAS
Application granted granted Critical
Publication of FR452068A publication Critical patent/FR452068A/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
    • H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR452068D 1912-10-29 1912-10-29 Téléphone porte-voix Expired FR452068A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR452068T 1912-10-29

Publications (1)

Publication Number Publication Date
FR452068A true FR452068A (fr) 1913-05-06

Family

ID=1492331

Family Applications (1)

Application Number Title Priority Date Filing Date
FR452068D Expired FR452068A (fr) 1912-10-29 1912-10-29 Téléphone porte-voix

Country Status (1)

Country Link
FR (1) FR452068A (fr)

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