FR635618A - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR635618A
FR635618A FR635618DA FR635618A FR 635618 A FR635618 A FR 635618A FR 635618D A FR635618D A FR 635618DA FR 635618 A FR635618 A FR 635618A
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)
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.)
Associated Telephon & Telegrap
Original Assignee
Associated Telephon & Telegrap
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 Associated Telephon & Telegrap filed Critical Associated Telephon & Telegrap
Application granted granted Critical
Publication of FR635618A publication Critical patent/FR635618A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q3/00Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Relay Circuits (AREA)
FR635618D 1926-06-14 1927-06-08 Improvements to telephone systems Expired FR635618A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US272461XA 1926-06-14 1926-06-14

Publications (1)

Publication Number Publication Date
FR635618A true FR635618A (en) 1928-03-20

Family

ID=21836558

Family Applications (1)

Application Number Title Priority Date Filing Date
FR635618D Expired FR635618A (en) 1926-06-14 1927-06-08 Improvements to telephone systems

Country Status (2)

Country Link
FR (1) FR635618A (en)
GB (1) GB272461A (en)

Also Published As

Publication number Publication date
GB272461A (en) 1928-07-30

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