DK74878A - Kredsloeb til en frihoejttalertelefon - Google Patents

Kredsloeb til en frihoejttalertelefon

Info

Publication number: DK74878A
Authority: DK; Denmark
Prior art keywords: circuit; speaker phone; speaker; phone
Prior art date: 1977-11-16

Application number

DK74878A

Other languages

English (en)

Inventor

J Brosow

Original Assignee

Dasy Int Sa

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.)

1977-11-16

Filing date

1978-02-20

Publication date

1979-05-17

1977-11-16 Priority claimed from DE19772751248 external-priority patent/DE2751248C3/de

1977-11-16 Priority claimed from DE19772751261 external-priority patent/DE2751261C3/de

1978-02-20 Application filed by Dasy Int Sa filed Critical Dasy Int Sa

1979-05-17 Publication of DK74878A publication Critical patent/DK74878A/da

Links

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
- H04M9/10—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic with switching of direction of transmission by voice frequency

Landscapes

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

DK74878A 1977-11-16 1978-02-20 Kredsloeb til en frihoejttalertelefon DK74878A (da)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE19772751248 DE2751248C3 (de)	1977-11-16	1977-11-16	Schaltungsanordnung für ein Freisprechertelefon
DE19772751261 DE2751261C3 (de)	1977-11-16	1977-11-16	Schaltungsanordnung für ein Freisprechertelefon mit selbsttätiger Signalamplitudenbegrenzung

Publications (1)

Publication Number	Publication Date
DK74878A true DK74878A (da)	1979-05-17

Family

ID=25773095

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
DK74878A DK74878A (da)	1977-11-16	1978-02-20	Kredsloeb til en frihoejttalertelefon

Country Status (10)

Country	Link
JP (1)	JPS5472906A (da)
CH (1)	CH626485A5 (da)
DK (1)	DK74878A (da)
FI (1)	FI780555A7 (da)
FR (1)	FR2409645A2 (da)
GB (1)	GB1568329A (da)
IT (1)	IT1161440B (da)
LU (1)	LU79026A1 (da)
NL (1)	NL7801820A (da)
SE (1)	SE7801902L (da)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB8317706D0 (en) *	1983-06-29	1983-08-03	Standard Telephones Cables Ltd	Telephone subsets
US4724540A (en) *	1986-09-02	1988-02-09	Motorola, Inc.	Speakerphone with fast idle mode
JPH06338934A (ja) *	1993-05-25	1994-12-06	Exar Corp	事象駆動型制御回路を有するスピーカーホーン

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4051325A (en) *	1975-01-31	1977-09-27	Matsushita Electric Industrial Co., Ltd.	Speech intercommunication system
DE2638286C3 (de) *	1976-08-25	1979-03-01	Dasy Inter S.A., Genf (Schweiz)	Schaltungsanordnung für ein Freisprechertelefon

1978
- 1978-02-08 LU LU79026A patent/LU79026A1/de unknown
- 1978-02-16 FR FR7804396A patent/FR2409645A2/fr active Pending
- 1978-02-16 GB GB6251/78A patent/GB1568329A/en not_active Expired
- 1978-02-17 NL NL7801820A patent/NL7801820A/xx not_active Application Discontinuation
- 1978-02-20 SE SE7801902A patent/SE7801902L/xx unknown
- 1978-02-20 CH CH182478A patent/CH626485A5/de not_active IP Right Cessation
- 1978-02-20 IT IT12485/78A patent/IT1161440B/it active
- 1978-02-20 DK DK74878A patent/DK74878A/da not_active Application Discontinuation
- 1978-02-20 FI FI780555A patent/FI780555A7/fi unknown
- 1978-02-20 JP JP1840878A patent/JPS5472906A/ja active Pending

Also Published As

Publication number	Publication date
CH626485A5 (en)	1981-11-13
FI780555A7 (fi)	1979-05-17
SE7801902L (sv)	1979-05-17
IT1161440B (it)	1987-03-18
IT7812485A0 (it)	1978-02-20
FR2409645A2 (fr)	1979-06-15
LU79026A1 (de)	1978-06-21
GB1568329A (en)	1980-05-29
JPS5472906A (en)	1979-06-11
NL7801820A (nl)	1979-05-18

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Legal Events

Date	Code	Title	Description
1985-09-23	AHS	Application shelved for other reasons than non-payment