NL149661B - SPEAKING TELEPHONE SET. - Google Patents

SPEAKING TELEPHONE SET.

Info

Publication number: NL149661B
Authority: NL; Netherlands
Prior art keywords: telephone set; speaking telephone; speaking; telephone
Prior art date: 1968-12-20

Application number

NL6918526A

Other languages

Dutch (nl)

Other versions

NL6918526A (en

Original Assignee

Siemens Ag

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.)

1968-12-20

Filing date

1969-12-10

Publication date

1976-05-17

1969-12-10 Application filed by Siemens Ag filed Critical Siemens Ag

1970-06-23 Publication of NL6918526A publication Critical patent/NL6918526A/xx

1976-05-17 Publication of NL149661B publication Critical patent/NL149661B/en

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Mobile Radio Communication Systems (AREA)
Telephonic Communication Services (AREA)
Control Of Amplification And Gain Control (AREA)

NL6918526A 1968-12-20 1969-12-10 SPEAKING TELEPHONE SET. NL149661B (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE19681816146 DE1816146B2 (en)	1968-12-20	1968-12-20	CIRCUIT ARRANGEMENT FOR LOUD TELEPHONE STATIONS

Publications (2)

Publication Number	Publication Date
NL6918526A NL6918526A (en)	1970-06-23
NL149661B true NL149661B (en)	1976-05-17

Family

ID=5716962

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL6918526A NL149661B (en)	1968-12-20	1969-12-10	SPEAKING TELEPHONE SET.

Country Status (9)

Country	Link
AT (1)	AT299334B (en)
BE (1)	BE743453A (en)
CH (1)	CH502731A (en)
DE (1)	DE1816146B2 (en)
FR (1)	FR2026658A1 (en)
GB (1)	GB1228117A (en)
LU (1)	LU60045A1 (en)
NL (1)	NL149661B (en)
SE (1)	SE345362B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2460575A1 (en) *	1979-06-29	1981-01-23	Trt Telecom Radio Electr	Telephone set having earpiece amplifier - whose gain can be preset by user by dialling selected code using phone dial or pushbutton keyboard
DE2937638C2 (en) *	1979-09-18	1981-11-26	Krone Gmbh, 1000 Berlin	Non-latching button as an on / off switch and for volume adjustment
US4497980A (en) *	1983-06-16	1985-02-05	Itt Corporation	Handsfree circuit for telephone instrument

1968
- 1968-12-20 DE DE19681816146 patent/DE1816146B2/en not_active Withdrawn
1969
- 1969-12-10 NL NL6918526A patent/NL149661B/en unknown
- 1969-12-16 CH CH1869569A patent/CH502731A/en not_active IP Right Cessation
- 1969-12-17 GB GB1228117D patent/GB1228117A/en not_active Expired
- 1969-12-17 FR FR6943694A patent/FR2026658A1/fr not_active Withdrawn
- 1969-12-18 AT AT1180469A patent/AT299334B/en not_active IP Right Cessation
- 1969-12-18 LU LU60045D patent/LU60045A1/xx unknown
- 1969-12-19 BE BE743453D patent/BE743453A/xx unknown
- 1969-12-22 SE SE1779869A patent/SE345362B/xx unknown

Also Published As

Publication number	Publication date
DE1816146B2 (en)	1972-02-10
AT299334B (en)	1972-06-12
BE743453A (en)	1970-06-19
LU60045A1 (en)	1970-02-18
CH502731A (en)	1971-01-31
GB1228117A (en)	1971-04-15
DE1816146A1 (en)	1970-07-02
NL6918526A (en)	1970-06-23
SE345362B (en)	1972-05-23
FR2026658A1 (en)	1970-09-18

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