NL56885C - - Google Patents

Info

Publication number: NL56885C
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.)

1938-08-03

Publication of NL56885C publication Critical patent/NL56885C/xx

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- 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
- H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling

Landscapes

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

NL56885D 1938-08-03 NL56885C (en))

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DEL95329A DE707378C (de)	1938-08-03	1938-08-03	Schaltungsanordnung fuer Fernmedeanlagen, bei denen die Signale durch Wechselstroeme einer bestimmten Frequenzfolge gegeben werden

Publications (1)

Publication Number	Publication Date
NL56885C true NL56885C (en))

Family

ID=27797495

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL56885D NL56885C (en))	1938-08-03

Country Status (6)

Country	Link
US (1)	US2208928A (en))
BE (1)	BE435741A (en))
CH (1)	CH212535A (en))
DE (1)	DE707378C (en))
FR (1)	FR858526A (en))
NL (1)	NL56885C (en))

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE960737C (de) *	1951-02-24	1957-04-18	Siemens Ag	Schaltungsanordnung fuer Fernsprechanlagen, in denen zur Signalgabe Wechselstroeme innerhalb des Sprachbandes benutzt werden
US5528682A (en) *	1995-01-30	1996-06-18	Harris Corporation	Double duty capacitor circuit and method

0
- BE BE435741D patent/BE435741A/xx unknown
- NL NL56885D patent/NL56885C/xx active
1938
- 1938-08-03 DE DEL95329A patent/DE707378C/de not_active Expired
1939
- 1939-07-29 US US287198A patent/US2208928A/en not_active Expired - Lifetime
- 1939-07-31 FR FR858526D patent/FR858526A/fr not_active Expired
- 1939-07-31 CH CH212535D patent/CH212535A/de unknown

Also Published As

Publication number	Publication date
CH212535A (de)	1940-11-30
US2208928A (en)	1940-07-23
FR858526A (fr)	1940-11-27
BE435741A (en))
DE707378C (de)	1941-06-20

Publication	Publication Date	Title
HU123447A (en))
FR823808A (en))	1938-01-27
NO60344A (en))
BE427798A (en))
BE423866A (en))
BE426319A (en))
NL56885C (en))
NL55167C (en))
NL53115C (en))	1942-04-15
NL53070C (en))
BE437144A (en))
BE434077A (en))
BE433334A (en))
BE431240A (en))
BE428654A (en))
BE428507A (en))	1938-07-30
BE426318A (en))
BE428470A (en))
BE428437A (en))
BE428344A (en))
BE428170A (en))	1938-06-30
BE428159A (en))
BE428127A (en))
BE428117A (en))
BE423383A (en))