FR620741A - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR620741A
FR620741A FR620741DA FR620741A FR 620741 A FR620741 A FR 620741A FR 620741D A FR620741D A FR 620741DA FR 620741 A FR620741 A FR 620741A
Authority
FR
France
Prior art keywords
telephone systems
telephone
systems
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
Stanley Gordon Sinclair Dicker
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 filed Critical
Application granted granted Critical
Publication of FR620741A publication Critical patent/FR620741A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
FR620741D 1925-10-13 1926-08-05 Improvements to telephone systems Expired FR620741A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2561025A GB264229A (en) 1925-10-13 1925-10-13 Improvements in or relating to telephone systems

Publications (1)

Publication Number Publication Date
FR620741A true FR620741A (en) 1927-04-28

Family

ID=10230466

Family Applications (1)

Application Number Title Priority Date Filing Date
FR620741D Expired FR620741A (en) 1925-10-13 1926-08-05 Improvements to telephone systems

Country Status (2)

Country Link
FR (1) FR620741A (en)
GB (1) GB264229A (en)

Also Published As

Publication number Publication date
GB264229A (en) 1927-01-13

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