FR923733A - Improvements to automatic telephone systems - Google Patents

Improvements to automatic telephone systems

Info

Publication number
FR923733A
FR923733A FR923733DA FR923733A FR 923733 A FR923733 A FR 923733A FR 923733D A FR923733D A FR 923733DA FR 923733 A FR923733 A FR 923733A
Authority
FR
France
Prior art keywords
telephone systems
automatic telephone
automatic
systems
telephone
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
William Hatton
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of FR923733A publication Critical patent/FR923733A/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)
  • Monitoring And Testing Of Exchanges (AREA)
FR923733D 1945-03-12 1946-03-12 Improvements to automatic telephone systems Expired FR923733A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US582195A US2426210A (en) 1945-03-12 1945-03-12 Intercept operator's position for unassigned party line stations

Publications (1)

Publication Number Publication Date
FR923733A true FR923733A (en) 1947-07-16

Family

ID=24328192

Family Applications (1)

Application Number Title Priority Date Filing Date
FR923733D Expired FR923733A (en) 1945-03-12 1946-03-12 Improvements to automatic telephone systems

Country Status (5)

Country Link
US (1) US2426210A (en)
CH (1) CH262449A (en)
ES (1) ES173251A1 (en)
FR (1) FR923733A (en)
NL (1) NL76335C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2871300A (en) * 1953-03-12 1959-01-27 Itt Intercept discriminator
US3909543A (en) * 1974-01-17 1975-09-30 Itt Disconnector circuit arrangement

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1727137A (en) * 1925-12-21 1929-09-03 Automatic Electric Inc Automatic telephone system
US1738059A (en) * 1926-09-22 1929-12-03 Automatic Electric Inc Telephone system
US2224497A (en) * 1939-04-15 1940-12-10 Associated Electric Lab Inc Telephone system
US2300186A (en) * 1941-03-29 1942-10-27 Kellogg Switchboard & Supply Telephone system
US2344634A (en) * 1942-01-08 1944-03-21 Stromberg Carlson Telephone Telephone intercept system

Also Published As

Publication number Publication date
ES173251A1 (en) 1946-05-16
CH262449A (en) 1949-06-30
US2426210A (en) 1947-08-26
NL76335C (en)

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