NL56428C - - Google Patents

Info

Publication number: NL56428C
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.)

1941-07-11

Publication of NL56428C publication Critical patent/NL56428C/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
- H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
- H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Circuit Arrangements For Discharge Lamps (AREA)

NL56428D 1941-07-11 NL56428C (cs)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
NL2474220X		1941-07-11

Publications (1)

Publication Number	Publication Date
NL56428C true NL56428C (cs)

Family

ID=19874317

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL56428D NL56428C (cs)	1941-07-11

Country Status (3)

Country	Link
US (1)	US2474220A (cs)
FR (1)	FR883649A (cs)
NL (1)	NL56428C (cs)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US1964110A (en) *	1931-11-10	1934-06-26	American Telephone & Telegraph	Control system
US1932606A (en) *	1932-06-11	1933-10-31	American Telephone & Telegraph	Gas filled discharge tube control system
US2022030A (en) *	1935-02-16	1935-11-26	Bell Telephone Labor Inc	Signaling system
US2104142A (en) *	1935-12-27	1938-01-04	American Telephone & Telegraph	Gas-filled tube circuits
US2214572A (en) *	1939-04-25	1940-09-10	Press Wireless Inc	Printing telegraph motor control method and apparatus

0
- NL NL56428D patent/NL56428C/xx active
1942
- 1942-06-29 FR FR883649D patent/FR883649A/fr not_active Expired
1943
- 1943-01-22 US US473272A patent/US2474220A/en not_active Expired - Lifetime

Also Published As

Publication number	Publication date
US2474220A (en)	1949-06-28
FR883649A (fr)	1943-07-09

Publication	Publication Date	Title
FR885858A (cs)	1943-09-28
BE442109A (cs)	1941-08-30
NL59264C (cs)	1947-04-15
IT394036B (cs)	1942-04-18
BE443214A (cs)
BE443220A (cs)	1941-11-29
NL79204C (cs)
NL66669C (cs)
NL64283C (cs)
NL59336C (cs)
NL58213C (cs)
NL56854C (cs)
BE462137A (cs)
BE446011A (cs)
BE443437A (cs)
BE443410A (cs)	1942-01-31
BE443268A (cs)
BE443255A (cs)
BE443226A (cs)	1941-11-29
BE441713A (cs)	1941-07-31
BE443217A (cs)	1941-11-29
BE443150A (cs)	1941-11-29
BE443094A (cs)	1941-11-29
BE443029A (cs)
BE443017A (cs)