GB602119A - Improvements in or relating to direct call telephone systems - Google Patents

Improvements in or relating to direct call telephone systems

Info

Publication number: GB602119A
Authority: GB; United Kingdom
Prior art keywords: key; passenger; telephone; relay; mor
Prior art date: 1945-10-12
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

GB2671645A

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.)

INTERNAT MARINE RADIO Co

LLOYD GEORGE NUTTALL

Original Assignee

INTERNAT MARINE RADIO Co

LLOYD GEORGE NUTTALL

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.)

1945-10-12

Filing date

1945-10-12

Publication date

1948-05-20

Priority to FR956810D priority Critical patent/FR956810A/fr

Priority to BE476547D priority patent/BE476547A/xx

1945-10-12 Application filed by INTERNAT MARINE RADIO Co, LLOYD GEORGE NUTTALL filed Critical INTERNAT MARINE RADIO Co

1945-10-12 Priority to GB2671645A priority patent/GB602119A/en

1948-05-20 Publication of GB602119A publication Critical patent/GB602119A/en

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/001—Two-way communication systems between a limited number of parties

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Radio Relay Systems (AREA)
Interconnected Communication Systems, Intercoms, And Interphones (AREA)

GB2671645A 1945-10-12 1945-10-12 Improvements in or relating to direct call telephone systems Expired GB602119A (en)

Priority Applications (3)

Application Number	Priority Date	Filing Date	Title
FR956810D FR956810A (tr)	1945-10-12
BE476547D BE476547A (tr)	1945-10-12
GB2671645A GB602119A (en)	1945-10-12	1945-10-12	Improvements in or relating to direct call telephone systems

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB2671645A GB602119A (en)	1945-10-12	1945-10-12	Improvements in or relating to direct call telephone systems

Publications (1)

Publication Number	Publication Date
GB602119A true GB602119A (en)	1948-05-20

Family

ID=10248105

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
GB2671645A Expired GB602119A (en)	1945-10-12	1945-10-12	Improvements in or relating to direct call telephone systems

Country Status (3)

Country	Link
BE (1)	BE476547A (tr)
FR (1)	FR956810A (tr)
GB (1)	GB602119A (tr)

0
- BE BE476547D patent/BE476547A/xx unknown
- FR FR956810D patent/FR956810A/fr not_active Expired
1945
- 1945-10-12 GB GB2671645A patent/GB602119A/en not_active Expired

Also Published As

Publication number	Publication date
BE476547A (tr)
FR956810A (tr)	1950-02-08

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