BE749241A - Perfectionnements aux systemes d'intercommunication - Google Patents

Perfectionnements aux systemes d'intercommunication

Info

Publication number: BE749241A
Authority: BE; Belgium
Prior art keywords: intercommunication systems; intercommunication; systems
Prior art date: 1969-04-23

Application number

Other languages

English (en)

Inventor

E Pinede

Original Assignee

Int Standard Electric Corp

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.)

1969-04-23

Filing date

1970-04-21

Publication date

1970-10-21

1970-04-21 Application filed by Int Standard Electric Corp filed Critical Int Standard Electric Corp

1970-10-21 Publication of BE749241A publication Critical patent/BE749241A/fr

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
- 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

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Computer Networks & Wireless Communication (AREA)
Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Telephonic Communication Services (AREA)

BE749241D 1969-04-23 1970-04-21 Perfectionnements aux systemes d'intercommunication BE749241A (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CA049568A CA920258A (en)	1969-04-23	1969-04-23	Key telephone systems using pushbutton or rotary dials

Publications (1)

Publication Number	Publication Date
BE749241A true BE749241A (fr)	1970-10-21

Family

ID=4085174

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE749241D BE749241A (fr)	1969-04-23	1970-04-21	Perfectionnements aux systemes d'intercommunication

Country Status (6)

Country	Link
US (1)	US3609249A (fr)
BE (1)	BE749241A (fr)
CA (1)	CA920258A (fr)
CH (1)	CH529494A (fr)
ES (1)	ES378912A1 (fr)
GB (1)	GB1272723A (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
BE791688A (fr) *	1971-11-24	1973-03-16	Western Electric Co	Montage pour systeme d'autocommutateur prive
JPS4916309A (fr) *	1972-05-18	1974-02-13
JPS4996615A (fr) *	1973-01-13	1974-09-12
GB1480341A (en) *	1973-10-25	1977-07-20	Gen Electric Co Ltd	Electric impulse transmitters for telephone instruments
US4048450A (en) *	1974-10-25	1977-09-13	Bernard Jean Michel	Trunk circuit traffic analyzer
US4029909A (en) *	1976-03-23	1977-06-14	International Telephone And Telegraph Corporation	Operator supervisory circuit for a key telephone system
US4158110A (en) *	1977-08-25	1979-06-12	Tone Commander Systems, Inc.	Tone selective key telephone intercom system including digital tone detector

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3143602A (en) *	1961-05-19	1964-08-04	Bell Telephone Labor Inc	Multifrequency signal receiver
US3111185A (en) *	1961-06-30	1963-11-19	Butler Oscar	Control system for public carrier vehicles
US3328530A (en) *	1963-10-10	1967-06-27	Automatic Elect Lab	Director system with time division access of a common translator

1969
- 1969-04-23 CA CA049568A patent/CA920258A/en not_active Expired
- 1969-07-09 US US840289A patent/US3609249A/en not_active Expired - Lifetime
1970
- 1970-04-16 GB GB08201/70A patent/GB1272723A/en not_active Expired
- 1970-04-20 CH CH585270A patent/CH529494A/de not_active IP Right Cessation
- 1970-04-21 BE BE749241D patent/BE749241A/fr unknown
- 1970-04-22 ES ES378912A patent/ES378912A1/es not_active Expired

Also Published As

Publication number	Publication date
ES378912A1 (es)	1972-08-01
US3609249A (en)	1971-09-28
CH529494A (de)	1972-10-15
GB1272723A (en)	1972-05-03
CA920258A (en)	1973-01-30

Similar Documents

Publication	Publication Date	Title
BE757672A (fr)	1971-04-19	Complexes d'auro-trialcoylphosphine de 1-beta-D-glucopyranosides
BR7106427D0 (pt)	1973-01-09	Aperfeicoamentos em filtros
BE770513A (fr)	1971-12-01	Systemes d'entrainement
BE749241A (fr)	1970-10-21	Perfectionnements aux systemes d'intercommunication
FR1500269A (fr)	1967-11-03	Perfectionnement aux procédés d'électrolyse
TR17159A (tr)	1974-04-25	Bulamac halinde doekuem
BE759518A (fr)	1971-04-30	Perfectionnements aux moissonneuses-batteuses
BE752802A (fr)	1970-12-16	Systemes de developpement
SE385088B (sv)	1976-06-08	Respirator
BE760432A (fr)	1971-05-27	Perfectionnements apportes aux metiers de bonneterie
BE776921A (fr)	1972-06-19	Systemes d'evaporateurs
BE759707A (fr)	1971-06-02	Perfectionnements aux systemes de telecommunication
BE744528A (fr)	1970-07-16	Inducteurs d'interferon
CH505449A (de)	1971-03-31	Potentiometer
BE770750A (fr)	1971-12-01	Perfectionnements aux moissonneuses-batteuses
BE746557A (fr)	1970-07-31	Oreiller
CH505325A (de)	1971-03-31	Drossel
DE6907907U (de)	1969-06-26	Briefbogen
FR1523664A (fr)	1968-05-03	Modificateur d'écoulement
IL34080A0 (en)	1970-05-21	Improvements in irrigation systems
YU118070A (en)	1975-08-31	Krmilni ventil
ES195009Y (es)	1975-06-01	Mejoras en cables coaxiles.
BE755741A (fr)	1971-03-03	N-arylsufonyl-n'-2-tetrahydrodicyclopentadienylurees
FI53889C (fi)	1978-08-10	Vingstabiliserad projektil saerskilt moersargranat foer granatkastare
FR90729E (fr)	1968-02-02	Perfectionnement aux mécanismes d'essuie-glace