NL71148C - - Google Patents

Info

Publication number: NL71148C
Authority: NL; Netherlands

Application number

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.)

1942-04-20

Publication of NL71148C publication Critical patent/NL71148C/xx

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/50—Conversion between different kinds of signals
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Interface Circuits In Exchanges (AREA)
Telephonic Communication Services (AREA)

NL71148D 1942-04-20 NL71148C (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB247351X		1942-04-20

Publications (1)

Publication Number	Publication Date
NL71148C true NL71148C (enrdf_load_stackoverflow)

Family

ID=10216422

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL71148D NL71148C (enrdf_load_stackoverflow)	1942-04-20

Country Status (5)

Country	Link
US (1)	US2422285A (enrdf_load_stackoverflow)
CH (2)	CH247351A (enrdf_load_stackoverflow)
FR (1)	FR933089A (enrdf_load_stackoverflow)
GB (1)	GB556920A (enrdf_load_stackoverflow)
NL (1)	NL71148C (enrdf_load_stackoverflow)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US1463972A (en) *		1923-08-07		Automatic telephone system
US1503923A (en) *	1918-05-06	1924-08-05	Stromberg Carlson Telephone	Telephone switching system
US2090205A (en) *	1934-06-21	1937-08-17	Siemens Brothers & Co Ltd	Electric remote control system
US2058216A (en) *	1935-05-11	1936-10-20	Bell Telephone Labor Inc	Signaling system
GB469664A (en) *	1936-01-29	1937-07-29	Automatic Electric Co Ltd	Improvements in automatic switches for use in telephone or like systems

0
- NL NL71148D patent/NL71148C/xx active
1942
- 1942-04-20 GB GB5217/42A patent/GB556920A/en not_active Expired
1943
- 1943-03-06 US US478243A patent/US2422285A/en not_active Expired - Lifetime
- 1943-04-19 CH CH247351D patent/CH247351A/fr unknown
- 1943-04-19 CH CH251036D patent/CH251036A/fr unknown
1946
- 1946-08-29 FR FR933089D patent/FR933089A/fr not_active Expired

Also Published As

Publication number	Publication date
FR933089A (fr)	1948-04-09
CH247351A (fr)	1947-02-28
GB556920A (en)	1943-10-27
US2422285A (en)	1947-06-17
CH251036A (fr)	1947-09-30

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