FI781923A - Elektroakustisk tillsats foer telefon - Google Patents

Elektroakustisk tillsats foer telefon

Info

Publication number
FI781923A
FI781923A FI781923A FI781923A FI781923A FI 781923 A FI781923 A FI 781923A FI 781923 A FI781923 A FI 781923A FI 781923 A FI781923 A FI 781923A FI 781923 A FI781923 A FI 781923A
Authority
FI
Finland
Prior art keywords
tillsats
foer
electroacoustic
phone
tillsats foer
Prior art date
Application number
FI781923A
Other languages
English (en)
Finnish (fi)
Inventor
Abram Nathaniel Spanel
Leonard F Shepard
Original Assignee
Abram Nathaniel Spanel
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.)
Filing date
Publication date
Application filed by Abram Nathaniel Spanel filed Critical Abram Nathaniel Spanel
Publication of FI781923A publication Critical patent/FI781923A/fi

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/21—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads
    • H04M1/215—Combinations with auxiliary equipment, e.g. with clocks or memoranda pads by non-intrusive coupling means, e.g. acoustic couplers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
  • Telephone Function (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Mobile Radio Communication Systems (AREA)
FI781923A 1977-06-16 1978-06-15 Elektroakustisk tillsats foer telefon FI781923A (fi)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/807,104 US4115659A (en) 1977-06-16 1977-06-16 Electroacoustical telephone adapter

Publications (1)

Publication Number Publication Date
FI781923A true FI781923A (fi) 1978-12-17

Family

ID=25195585

Family Applications (1)

Application Number Title Priority Date Filing Date
FI781923A FI781923A (fi) 1977-06-16 1978-06-15 Elektroakustisk tillsats foer telefon

Country Status (21)

Country Link
US (1) US4115659A (xx)
JP (1) JPS605101B2 (xx)
AR (1) AR215716A1 (xx)
AU (1) AU517959B2 (xx)
BE (1) BE868153A (xx)
BR (1) BR7803853A (xx)
CA (1) CA1105630A (xx)
CH (1) CH633925A5 (xx)
DE (1) DE2826345C2 (xx)
DK (1) DK266778A (xx)
ES (1) ES470867A1 (xx)
FI (1) FI781923A (xx)
FR (1) FR2394943A1 (xx)
GB (1) GB2000665B (xx)
MX (1) MX144953A (xx)
NL (1) NL7806549A (xx)
NO (1) NO150300C (xx)
NZ (1) NZ187578A (xx)
PT (1) PT68175A (xx)
SE (1) SE430367B (xx)
SG (1) SG45782G (xx)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3009404A1 (de) * 1980-03-12 1981-09-17 Philips Patentverwaltung Gmbh, 2000 Hamburg Vorrichtung zum einstellen eines bewegbaren elektroakutischen schallwandlers
EP0050899A1 (en) * 1980-10-27 1982-05-05 CISE- Centro Informazioni Studi Esperienze S.p.A. Device for the transmission and receipt of signals through a telephone line
CA1181541A (en) * 1982-05-21 1985-01-22 Mitel Corporation Loudspeaking telephone
US4493950A (en) * 1982-12-17 1985-01-15 Lott Thomas M Loudspeaker telephone
US4497980A (en) * 1983-06-16 1985-02-05 Itt Corporation Handsfree circuit for telephone instrument
KR960008611B1 (ko) * 1986-06-30 1996-06-28 폴베스 안토니 전화보류장치
DE3843033A1 (de) * 1988-12-21 1990-06-28 Messerschmitt Boelkow Blohm Mikrofon hoher empfindlichkeit
US5491695A (en) * 1991-07-17 1996-02-13 Digital Access Corporation Means and method of dial up bridging of network for high bandwidth digital communication
US5701347A (en) * 1994-06-23 1997-12-23 Compaq Computer Corporation Audio system for a personal computer
US5633943A (en) * 1994-09-09 1997-05-27 Compaq Computer Corporation Audio system for a personal computer
US6501836B1 (en) * 1994-09-09 2002-12-31 Compaq Computer Corporation Audio system for a personal computer
US5828730A (en) 1995-01-19 1998-10-27 Sten-Tel, Inc. Method and apparatus for recording and managing communications for transcription
GB0024350D0 (en) * 2000-10-05 2000-11-22 Mitel Corp Use of handset microphone to enhance speakerphone loudspeaker performance
GB0315426D0 (en) * 2003-07-01 2003-08-06 Mitel Networks Corp Microphone array with physical beamforming using omnidirectional microphones

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2580439A (en) * 1949-09-07 1952-01-01 Bell Telephone Labor Inc Directional acoustic system
US2987575A (en) * 1955-11-10 1961-06-06 Norman L Chalfin Two way telephone handset amplifying system
US3189690A (en) * 1960-04-27 1965-06-15 Modern Telephones Great Britai Two-way telephone systems with talk-listen switching
US3725585A (en) * 1972-03-21 1973-04-03 Itt Loudspeaking telephone station circuit
DE2247097C3 (de) * 1972-09-26 1979-01-11 Siemens Ag, 1000 Berlin Und 8000 Muenchen Sprachgesteuerte Lautfernsprechanlage
DE2260401A1 (de) * 1972-12-09 1974-06-12 Zielinski Adolf Herbert Telefonadapter
US3887771A (en) * 1974-03-04 1975-06-03 Spanel Abram Nathaniel Telephone adapter
US4079196A (en) * 1976-03-16 1978-03-14 Abram Nathaniel Spanel Telephone control apparatus

Also Published As

Publication number Publication date
CH633925A5 (fr) 1982-12-31
JPS605101B2 (ja) 1985-02-08
DK266778A (da) 1978-12-17
NO150300B (no) 1984-06-12
AU3712078A (en) 1979-05-03
SE430367B (sv) 1983-11-07
SE7806809L (sv) 1978-12-17
DE2826345C2 (de) 1984-05-17
PT68175A (en) 1978-07-01
NO782065L (no) 1978-12-19
AR215716A1 (es) 1979-10-31
US4115659A (en) 1978-09-19
AU517959B2 (en) 1981-09-03
SG45782G (en) 1983-07-08
DE2826345A1 (de) 1979-01-04
GB2000665A (en) 1979-01-10
MX144953A (es) 1981-12-04
FR2394943A1 (fr) 1979-01-12
ES470867A1 (es) 1979-02-01
BR7803853A (pt) 1979-04-10
NZ187578A (en) 1981-10-19
BE868153A (fr) 1978-12-15
CA1105630A (en) 1981-07-21
NO150300C (no) 1984-09-19
GB2000665B (en) 1982-04-21
JPS5417605A (en) 1979-02-09
NL7806549A (nl) 1978-12-19

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Legal Events

Date Code Title Description
FD Application lapsed

Owner name: SPANEL, ABRAM NATHANIEL