FR517393A - Phone enhancements - Google Patents

Phone enhancements

Info

Publication number
FR517393A
FR517393A FR517393DA FR517393A FR 517393 A FR517393 A FR 517393A FR 517393D A FR517393D A FR 517393DA FR 517393 A FR517393 A FR 517393A
Authority
FR
France
Prior art keywords
enhancements
phone
phone enhancements
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.)
Telephone Manufacturing Co Ltd
Original Assignee
Telephone Manufacturing 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 Telephone Manufacturing Co Ltd filed Critical Telephone Manufacturing Co Ltd
Application granted granted Critical
Publication of FR517393A publication Critical patent/FR517393A/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)
  • Telephone Set Structure (AREA)
FR517393D 1919-12-13 1920-06-17 Phone enhancements Expired FR517393A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3126819A GB160243A (en) 1919-12-13 1919-12-13 Improvements in or relating to telephones

Publications (1)

Publication Number Publication Date
FR517393A true FR517393A (en) 1921-05-04

Family

ID=10320564

Family Applications (1)

Application Number Title Priority Date Filing Date
FR517393D Expired FR517393A (en) 1919-12-13 1920-06-17 Phone enhancements

Country Status (3)

Country Link
DE (1) DE403333C (en)
FR (1) FR517393A (en)
GB (1) GB160243A (en)

Also Published As

Publication number Publication date
DE403333C (en) 1924-09-27
GB160243A (en) 1921-03-14

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