FR2221885B1 - - Google Patents
Info
- Publication number
- FR2221885B1 FR2221885B1 FR7408283A FR7408283A FR2221885B1 FR 2221885 B1 FR2221885 B1 FR 2221885B1 FR 7408283 A FR7408283 A FR 7408283A FR 7408283 A FR7408283 A FR 7408283A FR 2221885 B1 FR2221885 B1 FR 2221885B1
- Authority
- FR
- France
- Legal status (The legal status 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 status listed.)
- Expired
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
-
- 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)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Circuit For Audible Band Transducer (AREA)
- Amplifiers (AREA)
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 (2)
| Publication Number | Publication Date |
|---|---|
| FR2221885A1 FR2221885A1 (nl) | 1974-10-11 |
| FR2221885B1 true FR2221885B1 (nl) | 1982-04-23 |
Family
ID=4096059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7408283A Expired FR2221885B1 (nl) | 1973-03-12 | 1974-03-12 |
Country Status (11)
| Country | Link |
|---|---|
| AU (1) | AU476504B2 (nl) |
| BE (1) | BE812212A (nl) |
| BR (1) | BR7401879D0 (nl) |
| CA (1) | CA976677A (nl) |
| FR (1) | FR2221885B1 (nl) |
| GB (1) | GB1444828A (nl) |
| IE (1) | IE40708B1 (nl) |
| IT (1) | IT1025013B (nl) |
| NL (1) | NL169809C (nl) |
| SE (1) | SE400148B (nl) |
| ZA (1) | ZA741555B (nl) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4178548A (en) * | 1976-10-04 | 1979-12-11 | Geraldine E. Thompson | Voice actuated mobile radio |
| DE2842369A1 (de) * | 1978-09-28 | 1980-04-10 | Siemens Ag | Schaltungsanordnung fuer eine sprachgesteuerte lautfernsprechstation in fernmelde-, insbesondere fernsprechanlagen |
| GB2174578B (en) * | 1985-05-04 | 1988-11-09 | Stc Plc | Loud speaking telephone |
| FI73341C (fi) * | 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/xx not_active IP Right Cessation
- 1974-03-12 NL NLAANVRAGE7403286,A patent/NL169809C/nl not_active IP Right Cessation
- 1974-03-12 GB GB1100174A patent/GB1444828A/en not_active Expired
- 1974-03-12 IE IE528/74A patent/IE40708B1/xx unknown
- 1974-03-12 BR BR741879A patent/BR7401879D0/pt unknown
- 1974-03-12 AU AU66579/74A patent/AU476504B2/en not_active Expired
- 1974-03-12 FR FR7408283A patent/FR2221885B1/fr not_active Expired
- 1974-03-12 BE BE141936A patent/BE812212A/xx unknown
- 1974-04-08 IT IT20494/74A patent/IT1025013B/it active
- 1974-04-09 ZA ZA00741555*[A patent/ZA741555B/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB1444828A (nl) | 1976-08-04 |
| NL169809C (nl) | 1982-08-16 |
| ZA741555B (en) | 1975-02-26 |
| IE40708B1 (en) | 1979-08-01 |
| DE2411501B2 (de) | 1975-08-21 |
| IT1025013B (it) | 1978-08-10 |
| DE2411501A1 (de) | 1974-10-10 |
| SE400148B (sv) | 1978-03-13 |
| CA976677A (en) | 1975-10-21 |
| BE812212A (fr) | 1974-07-31 |
| AU476504B2 (en) | 1976-09-23 |
| FR2221885A1 (nl) | 1974-10-11 |
| BR7401879D0 (pt) | 1974-11-19 |
| NL7403286A (nl) | 1974-09-16 |
| AU6657974A (en) | 1975-09-18 |
| NL169809B (nl) | 1982-03-16 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| CD | Change of name or company name | ||
| ST | Notification of lapse |