NL87551C - - Google Patents

Info

Publication number: NL87551C
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.)

1947-05-09

Publication of NL87551C publication Critical patent/NL87551C/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
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
- B24B7/07—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor involving a stationary work-table
- B24B7/08—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor involving a stationary work-table having an abrasive wheel built in
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/0016—Arrangements providing connection between exchanges

Landscapes

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

NL87551D 1947-05-09 NL87551C (xx)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB276278X		1947-05-09

Publications (1)

Publication Number	Publication Date
NL87551C true NL87551C (xx)

Family

ID=10262688

Family Applications (2)

Application Number	Title	Priority Date	Filing Date
NL87551D NL87551C (xx)	1947-05-09
NL61269866A NL140240B (nl)	1947-05-09		Werkwijze ter bereiding van halogeniden van de lysergzuur- en dihydrolysergzuurreeks.

Family Applications After (1)

Application Number	Title	Priority Date	Filing Date
NL61269866A NL140240B (nl)	1947-05-09		Werkwijze ter bereiding van halogeniden van de lysergzuur- en dihydrolysergzuurreeks.

Country Status (6)

Country	Link
US (1)	US2623951A (xx)
BE (2)	BE485295A (xx)
CH (1)	CH276278A (xx)
FR (1)	FR965690A (xx)
GB (1)	GB639141A (xx)
NL (2)	NL140240B (xx)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US1684422A (en) *		1928-09-18		Monitoring and controlling circuits for program distribution
US1733466A (en) *	1924-12-15	1929-10-29	Automatic Electric Inc	Trouble-indicating system
US2068293A (en) *	1926-09-14	1937-01-19	American Telephone & Telegraph	Means for producing time lag in electrical circuits
US1912450A (en) *	1930-12-19	1933-06-06	Western Electric Co	Telephone system
US1899112A (en) *	1931-06-22	1933-02-28	Associated Electric Lab Inc	Multioffice telephone system
US2095688A (en) *	1933-10-17	1937-10-12	James A Ballentine	Circuit control mechanism
US2233282A (en) *	1939-08-16	1941-02-25	Bell Telephone Labor Inc	Telephone system
US2249931A (en) *	1939-11-28	1941-07-22	Bell Telephone Labor Inc	Indicating and control circuits
US2278172A (en) *	1940-10-29	1942-03-31	Bell Telephone Labor Inc	Telephone system

0
- NL NL87551D patent/NL87551C/xx active
- BE BE482595D patent/BE482595A/xx unknown
- FR FR965690D patent/FR965690A/fr not_active Expired
- NL NL61269866A patent/NL140240B/xx unknown
- BE BE485295D patent/BE485295A/xx unknown
1947
- 1947-05-09 GB GB12622/47A patent/GB639141A/en not_active Expired
1948
- 1948-04-28 US US23842A patent/US2623951A/en not_active Expired - Lifetime
- 1948-04-29 CH CH276278D patent/CH276278A/de unknown

Also Published As

Publication number	Publication date
CH276278A (de)	1951-06-30
GB639141A (en)	1950-06-21
US2623951A (en)	1952-12-30
FR965690A (xx)	1950-09-19
NL140240B (nl)
BE485295A (xx)
BE482595A (xx)

Publication	Publication Date	Title
AT165657B (xx)
FR965685A (xx)	1950-09-19
AT165716B (xx)	1950-04-11
AT166672B (xx)	1950-09-11
AT165884B (xx)	1950-05-10
FR963978A (xx)	1950-07-26
AT165673B (xx)	1950-04-11
BE474505A (xx)	1947-04-30
FR965690A (xx)	1950-09-19
BE472727A (xx)
BE474335A (xx)
BE472571A (xx)
BE471206A (xx)
BE473383A (xx)
NL70949C (xx)
BE473400A (xx)
BE473401A (xx)	1947-06-30
BE473418A (xx)
BE473448A (xx)
BE473629A (xx)	1947-07-31
BE473812A (xx)
BE473954A (xx)
NL70094C (xx)
BE473995A (xx)
BE474080A (xx)