AT72207B - Circuit arrangement for telephone systems with automatic or semi-automatic operation. - Google Patents

Circuit arrangement for telephone systems with automatic or semi-automatic operation.

Info

Publication number: AT72207B
Authority: AT; Austria
Prior art keywords: automatic; semi; circuit arrangement; telephone systems; automatic operation
Prior art date: 1914-04-04

Application number

Other languages

Original Assignee

Siemens 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.)

1914-04-04

Filing date

1915-03-30

Publication date

1916-08-10

1915-03-30 Application filed by Siemens Ag filed Critical Siemens Ag

1916-08-10 Application granted granted Critical

1916-08-10 Publication of AT72207B publication Critical patent/AT72207B/en

Landscapes

Mobile Radio Communication Systems (AREA)
Interface Circuits In Exchanges (AREA)

Description

  

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AT72207D 1914-04-04 1915-03-30 Circuit arrangement for telephone systems with automatic or semi-automatic operation. AT72207B (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE72207X		1914-04-04

Publications (1)

Publication Number	Publication Date
AT72207B true AT72207B (en)	1916-08-10

Family

ID=5636049

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
AT72207D AT72207B (en)	1914-04-04	1915-03-30	Circuit arrangement for telephone systems with automatic or semi-automatic operation.

Country Status (1)

Country	Link
AT (1)	AT72207B (en)

1915
- 1915-03-30 AT AT72207D patent/AT72207B/en active

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