FR831632A - Improvements to telephone links to obtain amplified communications at reception - Google Patents
Improvements to telephone links to obtain amplified communications at receptionInfo
- Publication number
- FR831632A FR831632A FR831632DA FR831632A FR 831632 A FR831632 A FR 831632A FR 831632D A FR831632D A FR 831632DA FR 831632 A FR831632 A FR 831632A
- Authority
- FR
- France
- Prior art keywords
- reception
- obtain amplified
- telephone links
- amplified communications
- communications
- Prior art date
- 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
- H04M9/001—Two-way communication systems between a limited number of parties
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Emergency Alarm Devices (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR49397T | 1938-04-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR831632A true FR831632A (en) | 1938-09-09 |
Family
ID=8684581
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR831632D Expired FR831632A (en) | 1938-04-07 | 1937-04-13 | Improvements to telephone links to obtain amplified communications at reception |
FR49397D Expired FR49397E (en) | 1938-04-07 | 1938-04-07 | Improvements to telephone links to obtain amplified communications at reception |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR49397D Expired FR49397E (en) | 1938-04-07 | 1938-04-07 | Improvements to telephone links to obtain amplified communications at reception |
Country Status (3)
Country | Link |
---|---|
BE (1) | BE427523A (en) |
FR (2) | FR831632A (en) |
GB (1) | GB507697A (en) |
-
0
- BE BE427523D patent/BE427523A/xx unknown
-
1937
- 1937-04-13 FR FR831632D patent/FR831632A/en not_active Expired
-
1938
- 1938-04-07 FR FR49397D patent/FR49397E/en not_active Expired
- 1938-04-13 GB GB11413/38A patent/GB507697A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR49397E (en) | 1939-03-24 |
BE427523A (en) | |
GB507697A (en) | 1939-06-20 |
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