BE437349A - - Google Patents

Info

Publication number: BE437349A
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.)

1939-01-25

Publication of BE437349A publication Critical patent/BE437349A/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
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
- H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
- H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)

BE437349D 1939-01-25 BE437349A (enrdf_load_html_response)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE212745X		1939-01-25

Publications (1)

Publication Number	Publication Date
BE437349A true BE437349A (enrdf_load_html_response)

Family

ID=5809651

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE437349D BE437349A (enrdf_load_html_response)	1939-01-25

Country Status (3)

Country	Link
BE (1)	BE437349A (enrdf_load_html_response)
CH (1)	CH212745A (enrdf_load_html_response)
FR (1)	FR868478A (enrdf_load_html_response)

0
- BE BE437349D patent/BE437349A/xx unknown
1939
- 1939-12-06 CH CH212745D patent/CH212745A/de unknown
1940
- 1940-12-28 FR FR868478D patent/FR868478A/fr not_active Expired

Also Published As

Publication number	Publication date
FR868478A (fr)	1941-12-31
CH212745A (de)	1940-12-15

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