FR877937A - Installation téléphonique intérieure - Google Patents

Installation téléphonique intérieure

Info

Publication number: FR877937A
Authority: FR; France
Prior art keywords: telephone system; indoor telephone; indoor; telephone
Prior art date: 1940-12-23
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.)

Mix und Genest AG

Original Assignee

Mix und Genest AG

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.)

1940-12-23

Filing date

1941-12-20

Publication date

1943-01-06

1941-12-20 Application filed by Mix und Genest AG filed Critical Mix und Genest AG

1943-01-06 Application granted granted Critical

1943-01-06 Publication of FR877937A publication Critical patent/FR877937A/fr

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/40—Applications of speech amplifiers

Landscapes

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

FR877937D 1940-12-23 1941-12-20 Installation téléphonique intérieure Expired FR877937A (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE877937X		1940-12-23

Publications (1)

Publication Number	Publication Date
FR877937A true FR877937A (fr)	1943-01-06

Family

ID=6818297

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR877937D Expired FR877937A (fr)	1940-12-23	1941-12-20	Installation téléphonique intérieure

Country Status (1)

Country	Link
FR (1)	FR877937A (fr)

1941
- 1941-12-20 FR FR877937D patent/FR877937A/fr not_active Expired

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