NL257729A - - Google Patents

Info

Publication number: NL257729A
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.)

1959-12-28

Publication of NL257729A publication Critical patent/NL257729A/xx

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Signal Processing (AREA)
Devices For Supply Of Signal Current (AREA)

NL257729D 1959-12-28 NL257729A (el)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US862186A US3089001A (en)	1959-12-28	1959-12-28	Telephone ringing circuit

Publications (1)

Publication Number	Publication Date
NL257729A true NL257729A (el)

Family

ID=25337875

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL257729D NL257729A (el)	1959-12-28

Country Status (6)

Country	Link
US (1)	US3089001A (el)
JP (1)	JPS3818481B1 (el)
BE (1)	BE598493A (el)
FR (1)	FR1282008A (el)
GB (1)	GB965237A (el)
NL (1)	NL257729A (el)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3247327A (en) *	1963-01-17	1966-04-19	Northern Electric Co	Telephone signalling circuits

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US2180334A (en) *	1938-01-20	1939-11-21	Bell Telephone Labor Inc	Signaling system
US2761909A (en) *	1953-01-28	1956-09-04	Bell Telephone Labor Inc	Multifrequency oscillator
US2957950A (en) *	1954-11-18	1960-10-25	Bell Telephone Labor Inc	Transistor selective ringing circuit
US2824175A (en) *	1954-11-18	1958-02-18	Bell Telephone Labor Inc	Selective ringing circuits
US2823266A (en) *	1955-05-10	1958-02-11	Gen Dynamics Corp	Subscriber line ringing in an electronic telephone system
NL106433C (el) *	1955-11-14

0
- NL NL257729D patent/NL257729A/xx unknown
1959
- 1959-12-28 US US862186A patent/US3089001A/en not_active Expired - Lifetime
1960
- 1960-11-29 FR FR845337A patent/FR1282008A/fr not_active Expired
- 1960-12-07 GB GB42100/60A patent/GB965237A/en not_active Expired
- 1960-12-13 JP JP4844160A patent/JPS3818481B1/ja active Pending
- 1960-12-23 BE BE598493A patent/BE598493A/fr unknown

Also Published As

Publication number	Publication date
GB965237A (en)	1964-07-29
BE598493A (fr)	1961-04-14
JPS3818481B1 (el)	1963-09-16
US3089001A (en)	1963-05-07
FR1282008A (fr)	1962-01-19

Publication	Publication Date	Title
AT221460B (el)	1962-05-25
AT227430B (el)	1963-05-27
AT219274B (el)	1962-01-25
FR1194076A (el)	1959-11-06
DE1155297C2 (el)	1964-04-16
AT213304B (el)	1961-02-10
FR1193885A (el)	1959-11-05
JPS3818481B1 (el)	1963-09-16
FR1193958A (el)	1959-11-05
AT213627B (el)	1961-02-27
AT216640B (el)	1961-08-10
AT222246B (el)	1962-07-10
NL252085A (el)
BE586272A (el)
BE575242A (el)	1959-05-15
NL256694A (el)
NL247307A (el)
NL247112A (el)	1964-02-10
NL245037A (el)
NL136641C (el)
NL258796A (el)
NL6906450A (el)	1969-07-25
BE585191A (el)
NL97119C (el)
BE38840A (el)