FR31471E - Automatic switching system - Google Patents

Automatic switching system

Info

Publication number: FR31471E
Authority: FR; France
Prior art keywords: switching system; automatic switching; automatic; switching
Prior art date: 1923-05-18
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

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.)

COMAPGNIE FRANCAISE POUR L EXP

Compagnie Francaise Thomson Houston SA

Original Assignee

COMAPGNIE FRANCAISE POUR L EXP

Compagnie Francaise Thomson Houston SA

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.)

1923-05-18

Filing date

1925-08-17

Publication date

1924-03-14

1924-03-14 Application granted granted Critical

1924-03-14 Publication of FR31471E publication Critical patent/FR31471E/en

1925-08-17 Application filed by COMAPGNIE FRANCAISE POUR L EXP, Compagnie Francaise Thomson Houston SA filed Critical COMAPGNIE FRANCAISE POUR L EXP

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Interface Circuits In Exchanges (AREA)
Monitoring And Testing Of Exchanges (AREA)

FR31471D 1923-05-18 1925-08-17 Automatic switching system Expired FR31471E (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
FR570941T		1923-05-18

Publications (1)

Publication Number	Publication Date
FR31471E true FR31471E (en)	1924-03-14

Family

ID=8882589

Family Applications (5)

Application Number	Title	Priority Date	Filing Date
FR570941D Expired FR570941A (en)	1923-05-18	1923-05-18	Automatic switching system
FR28111D Expired FR28111E (en)	1923-05-18	1923-08-01
FR29482D Expired FR29482E (en)	1923-05-18	1924-04-29
FR31471D Expired FR31471E (en)	1923-05-18	1925-08-17	Automatic switching system
FR31705D Expired FR31705E (en)	1923-05-18	1925-09-07	Automatic switching system

Family Applications Before (3)

Application Number	Title	Priority Date	Filing Date
FR570941D Expired FR570941A (en)	1923-05-18	1923-05-18	Automatic switching system
FR28111D Expired FR28111E (en)	1923-05-18	1923-08-01
FR29482D Expired FR29482E (en)	1923-05-18	1924-04-29

Family Applications After (1)

Application Number	Title	Priority Date	Filing Date
FR31705D Expired FR31705E (en)	1923-05-18	1925-09-07	Automatic switching system

Country Status (4)

Country	Link
US (1)	US1556474A (en)
DE (2)	DE490255C (en)
FR (5)	FR570941A (en)
GB (2)	GB223985A (en)

1923
- 1923-05-18 FR FR570941D patent/FR570941A/en not_active Expired
- 1923-07-24 US US653568A patent/US1556474A/en not_active Expired - Lifetime
- 1923-07-31 GB GB19625/23A patent/GB223985A/en not_active Expired
- 1923-08-01 FR FR28111D patent/FR28111E/fr not_active Expired
- 1923-09-14 DE DEB111070D patent/DE490255C/en not_active Expired
1924
- 1924-04-29 FR FR29482D patent/FR29482E/fr not_active Expired
1925
- 1925-04-26 DE DEB119482D patent/DE505408C/en not_active Expired
- 1925-04-27 GB GB10959/25A patent/GB233339A/en not_active Expired
- 1925-08-17 FR FR31471D patent/FR31471E/en not_active Expired
- 1925-09-07 FR FR31705D patent/FR31705E/en not_active Expired

Also Published As

Publication number	Publication date
GB233339A (en)	1926-09-27
FR570941A (en)	1924-05-09
FR28111E (en)	1925-01-15
FR31705E (en)	1927-06-10
DE505408C (en)	1930-08-19
US1556474A (en)	1925-10-06
DE490255C (en)	1930-01-29
GB223985A (en)	1924-10-31
FR29482E (en)	1925-08-07

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