NL169809C - SPEAKING TELEPHONE. - Google Patents

SPEAKING TELEPHONE.

Info

Publication number: NL169809C
Authority: NL; Netherlands
Prior art keywords: speaking telephone; speaking; telephone
Prior art date: 1973-03-12

Application number

NLAANVRAGE7403286,A

Other languages

Dutch (nl)

Other versions

NL7403286A (en

NL169809B (en

Original Assignee

Northern Telecom Ltd

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.)

1973-03-12

Filing date

1974-03-12

Publication date

1982-08-16

1974-03-12 Application filed by Northern Telecom Ltd filed Critical Northern Telecom Ltd

1974-09-16 Publication of NL7403286A publication Critical patent/NL7403286A/xx

1982-03-16 Publication of NL169809B publication Critical patent/NL169809B/en

1982-08-16 Application granted granted Critical

1982-08-16 Publication of NL169809C publication Critical patent/NL169809C/en

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
- 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

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Circuit For Audible Band Transducer (AREA)
Amplifiers (AREA)
Interconnected Communication Systems, Intercoms, And Interphones (AREA)

NLAANVRAGE7403286,A 1973-03-12 1974-03-12 SPEAKING TELEPHONE. NL169809C (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CA165,801A CA976677A (en)	1973-03-12	1973-03-12	Loudspeaking communication terminal apparatus and method of operation

Publications (3)

Publication Number	Publication Date
NL7403286A NL7403286A (en)	1974-09-16
NL169809B NL169809B (en)	1982-03-16
NL169809C true NL169809C (en)	1982-08-16

Family

ID=4096059

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NLAANVRAGE7403286,A NL169809C (en)	1973-03-12	1974-03-12	SPEAKING TELEPHONE.

Country Status (11)

Country	Link
AU (1)	AU476504B2 (en)
BE (1)	BE812212A (en)
BR (1)	BR7401879D0 (en)
CA (1)	CA976677A (en)
FR (1)	FR2221885B1 (en)
GB (1)	GB1444828A (en)
IE (1)	IE40708B1 (en)
IT (1)	IT1025013B (en)
NL (1)	NL169809C (en)
SE (1)	SE400148B (en)
ZA (1)	ZA741555B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4178548A (en) *	1976-10-04	1979-12-11	Geraldine E. Thompson	Voice actuated mobile radio
DE2842369A1 (en) *	1978-09-28	1980-04-10	Siemens Ag	CIRCUIT ARRANGEMENT FOR A VOICE-CONTROLLED SPEAKER STATION IN TELECOMMUNICATION, IN PARTICULAR TELEPHONE SYSTEMS
GB2174578B (en) *	1985-05-04	1988-11-09	Stc Plc	Loud speaking telephone
FI73341C (en) *	1985-08-06	1987-09-10	Outel Oy	MELLANFOERSTAERKARE SOM ANVAENDS I TVAOLEDNINGSFOERBINDELSER I ETT VALBART TELEFONNAET SAMT FOERFARANDE FOER REGLERING AV DESS FOERSTAERKNING.
CA1291837C (en) *	1987-07-15	1991-11-05	Juro Ohga	Electronic telephone terminal having noise suppression function

1973
- 1973-03-12 CA CA165,801A patent/CA976677A/en not_active Expired
1974
- 1974-03-08 SE SE7403134A patent/SE400148B/en not_active IP Right Cessation
- 1974-03-12 IE IE528/74A patent/IE40708B1/en unknown
- 1974-03-12 GB GB1100174A patent/GB1444828A/en not_active Expired
- 1974-03-12 FR FR7408283A patent/FR2221885B1/fr not_active Expired
- 1974-03-12 NL NLAANVRAGE7403286,A patent/NL169809C/en not_active IP Right Cessation
- 1974-03-12 BR BR741879A patent/BR7401879D0/en unknown
- 1974-03-12 AU AU66579/74A patent/AU476504B2/en not_active Expired
- 1974-03-12 BE BE141936A patent/BE812212A/en unknown
- 1974-04-08 IT IT20494/74A patent/IT1025013B/en active
- 1974-04-09 ZA ZA00741555*[A patent/ZA741555B/en unknown

Also Published As

Publication number	Publication date
FR2221885A1 (en)	1974-10-11
IT1025013B (en)	1978-08-10
AU6657974A (en)	1975-09-18
NL7403286A (en)	1974-09-16
DE2411501A1 (en)	1974-10-10
FR2221885B1 (en)	1982-04-23
AU476504B2 (en)	1976-09-23
BR7401879D0 (en)	1974-11-19
IE40708B1 (en)	1979-08-01
GB1444828A (en)	1976-08-04
BE812212A (en)	1974-07-31
CA976677A (en)	1975-10-21
NL169809B (en)	1982-03-16
SE400148B (en)	1978-03-13
DE2411501B2 (en)	1975-08-21
ZA741555B (en)	1975-02-26

Publication	Publication Date	Title
NL7414096A (en)	1975-05-09	MORE DETAILS.
DK133480B (en)	1976-05-24	Underroft.
NL161949C (en)	1980-03-17	HAND MICROPHONE.
DK138910B (en)	1978-11-13	Thermovindue.
SE7314703L (en)	1975-01-27	LASMECHANISM.
NO140846C (en)	1979-11-21	HOW SPEAKERS.
NL7415585A (en)	1975-06-10	TELEPHONE SET.
BR7403020D0 (en)	1974-11-19	TELEPHONE
NL169809C (en)	1982-08-16	SPEAKING TELEPHONE.
NL7409520A (en)	1975-03-04	TELEPHONE CONNECTION INSTALLATION.
NL177547C (en)	1985-10-01	TELEPHONE SYSTEM.
NL7410772A (en)	1975-02-18	TELEPHONE SET.
ES189944Y (en)	1974-10-16	RING-BRACELET.
SE415553B (en)	1980-10-13	FERGVALSANORDNING.
CH555121A (en)	1974-10-15	COIN TELEPHONE.
ES187576Y (en)	1974-08-16	TELEPHONE MUNECA.
ES187677Y (en)	1974-08-16	PHONE BOOTH.
NL166167C (en)	1981-06-15	TELEPHONE CONNECTION SYSTEM.
CH552309A (en)	1974-07-31	TELEPHONE.
ES191467Y (en)	1974-12-16	TALKING MUNECO.
NL7412348A (en)	1975-03-20	DIALER.
ES193119Y (en)	1975-01-16	PERFECTED PHONE.
NO134819C (en)	1991-03-25	TELEPHONE APPARATUS.
ES189716Y (en)	1974-10-16	CLOCK PHONE.
ES194006Y (en)	1975-03-01	PHONE FOLDER.

Legal Events

Date	Code	Title	Description
1987-11-16	V1	Lapsed because of non-payment of the annual fee