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FR692380A - Improvements to telephone devices - Google Patents

Improvements to telephone devices

Info

Publication number
FR692380A
FR692380A FR692380DA FR692380A FR 692380 A FR692380 A FR 692380A FR 692380D A FR692380D A FR 692380DA FR 692380 A FR692380 A FR 692380A
Authority
FR
France
Prior art keywords
telephone devices
telephone
devices
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)
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.)
Siemens Brothers and Co Ltd
Original Assignee
Siemens Brothers and Co Ltd
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 Siemens Brothers and Co Ltd filed Critical Siemens Brothers and Co Ltd
Application granted granted Critical
Publication of FR692380A publication Critical patent/FR692380A/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
    • H04M1/03—Constructional features of telephone transmitters or receivers, e.g. telephone hand-sets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR692380D 1930-03-20 1930-03-20 Improvements to telephone devices Expired FR692380A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR692380T 1930-03-20

Publications (1)

Publication Number Publication Date
FR692380A true FR692380A (en) 1930-11-05

Family

ID=9037365

Family Applications (1)

Application Number Title Priority Date Filing Date
FR692380D Expired FR692380A (en) 1930-03-20 1930-03-20 Improvements to telephone devices

Country Status (2)

Country Link
BE (1) BE368906A (en)
FR (1) FR692380A (en)

Also Published As

Publication number Publication date
BE368906A (en)

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