FR985994A - Système de téléphonie interurbaine - Google Patents

Système de téléphonie interurbaine

Info

Publication number: FR985994A
Authority: FR; France
Prior art keywords: long distance; telephone system; distance telephone; long; telephone
Prior art date: 1949-02-25
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

English (en)

Inventor

Pierre-Charles Borel

Louis-Charles Andres

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.)

Thales SA

Original Assignee

Le Materiel Telephonique Thomson CSF

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.)

1949-02-25

Filing date

1949-02-25

Publication date

1951-07-25

1949-02-25 Application filed by Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF

1951-07-25 Application granted granted Critical

1951-07-25 Publication of FR985994A publication Critical patent/FR985994A/fr

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)

FR985994D 1949-02-25 1949-02-25 Système de téléphonie interurbaine Expired FR985994A (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
FR985994T		1949-02-25

Publications (1)

Publication Number	Publication Date
FR985994A true FR985994A (fr)	1951-07-25

Family

ID=9537768

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR985994D Expired FR985994A (fr)	1949-02-25	1949-02-25	Système de téléphonie interurbaine

Country Status (1)

Country	Link
FR (1)	FR985994A (fr)

1949
- 1949-02-25 FR FR985994D patent/FR985994A/fr not_active Expired

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