BE131631A - - Google Patents

Info

Publication number: BE131631A
Authority: BE; Belgium

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.)

1937-12-16

Publication of BE131631A publication Critical patent/BE131631A/xx

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/04—Switchboards

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Signal Processing (AREA)
Interface Circuits In Exchanges (AREA)
Monitoring And Testing Of Exchanges (AREA)

BE131631D 1937-12-16 BE131631A (US07582779-20090901-C00044.png)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US180075A US2173551A (en)	1937-12-16	1937-12-16	Communication system

Publications (1)

Publication Number	Publication Date
BE131631A true BE131631A (US07582779-20090901-C00044.png)

Family

ID=22659110

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE131631D BE131631A (US07582779-20090901-C00044.png)	1937-12-16

Country Status (4)

Country	Link
US (1)	US2173551A (US07582779-20090901-C00044.png)
BE (1)	BE131631A (US07582779-20090901-C00044.png)
DE (1)	DE742933C (US07582779-20090901-C00044.png)
FR (1)	FR847619A (US07582779-20090901-C00044.png)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2495773A (en) *	1942-12-30	1950-01-31	Bell Telephone Labor Inc	Alternating current telegraph system
US2605347A (en) *	1949-04-29	1952-07-29	Bell Telephone Labor Inc	Telegraph concentration board spare communication circuit

0
- BE BE131631D patent/BE131631A/xx unknown
- FR FR847619D patent/FR847619A/fr active Active
1937
- 1937-12-16 US US180075A patent/US2173551A/en not_active Expired - Lifetime
1938
- 1938-12-15 DE DEI63175D patent/DE742933C/de not_active Expired

Also Published As

Publication number	Publication date
US2173551A (en)	1939-09-19
DE742933C (de)	1943-12-16
FR847619A (US07582779-20090901-C00044.png)

Similar Documents

Publication	Publication Date	Title
FR847619A (US07582779-20090901-C00044.png)
IT356166B (US07582779-20090901-C00044.png)	1938-01-26
BE420085R (US07582779-20090901-C00044.png)	1937-03-31
FR47785E (US07582779-20090901-C00044.png)	1937-07-17
SE93450C1 (US07582779-20090901-C00044.png)	1938-11-25
BE419666A (US07582779-20090901-C00044.png)
BE420365A (US07582779-20090901-C00044.png)
NL50137C (US07582779-20090901-C00044.png)
BE412505A (US07582779-20090901-C00044.png)
BE417149A (US07582779-20090901-C00044.png)
NL48269C (US07582779-20090901-C00044.png)
NL47675C (US07582779-20090901-C00044.png)
NL44734C (US07582779-20090901-C00044.png)	1938-11-16
NL51751C (US07582779-20090901-C00044.png)
BE417582A (US07582779-20090901-C00044.png)
BE430432A (US07582779-20090901-C00044.png)
BE426823A (US07582779-20090901-C00044.png)	1938-05-31
BE426423A (US07582779-20090901-C00044.png)
BE422006A (US07582779-20090901-C00044.png)
BE419342A (US07582779-20090901-C00044.png)	1937-02-27
BE419443A (US07582779-20090901-C00044.png)
BE419523A (US07582779-20090901-C00044.png)
BE421670A (US07582779-20090901-C00044.png)	1937-06-30
BE421925A (US07582779-20090901-C00044.png)
BE420815A (US07582779-20090901-C00044.png)