NL7212389A - - Google Patents
Info
- Publication number
- NL7212389A NL7212389A NL7212389A NL7212389A NL7212389A NL 7212389 A NL7212389 A NL 7212389A NL 7212389 A NL7212389 A NL 7212389A NL 7212389 A NL7212389 A NL 7212389A NL 7212389 A NL7212389 A NL 7212389A
- Authority
- NL
- Netherlands
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems; Audible personal calling systems
- G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7133615A FR2152486B1 (en) | 1971-09-17 | 1971-09-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL7212389A true NL7212389A (en) | 1973-03-20 |
Family
ID=9083139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7212389A NL7212389A (en) | 1971-09-17 | 1972-09-13 |
Country Status (9)
| Country | Link |
|---|---|
| AR (1) | AR193434A1 (en) |
| BE (1) | BE788631A (en) |
| BR (1) | BR7206373D0 (en) |
| DE (1) | DE2244894A1 (en) |
| ES (1) | ES406763A1 (en) |
| FR (1) | FR2152486B1 (en) |
| IT (1) | IT967481B (en) |
| LU (1) | LU66054A1 (en) |
| NL (1) | NL7212389A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2466813A1 (en) * | 1979-09-28 | 1981-04-10 | Legrand Sa | Audible and visible electronic alarm circuit - has detector sensitive to impedance change to operate isolated circuits via relay contacts |
| GB2097256B (en) * | 1981-04-02 | 1985-05-30 | Morelle Jean V | Compositions containing n-butyryl alphaaminoacids |
-
0
- BE BE788631D patent/BE788631A/en unknown
-
1971
- 1971-09-17 FR FR7133615A patent/FR2152486B1/fr not_active Expired
-
1972
- 1972-09-12 LU LU66054D patent/LU66054A1/xx unknown
- 1972-09-13 NL NL7212389A patent/NL7212389A/xx unknown
- 1972-09-13 DE DE19722244894 patent/DE2244894A1/en active Pending
- 1972-09-14 BR BR637372A patent/BR7206373D0/en unknown
- 1972-09-15 IT IT2922172A patent/IT967481B/en active
- 1972-09-15 AR AR24411272A patent/AR193434A1/en active
- 1972-09-16 ES ES406763A patent/ES406763A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| IT967481B (en) | 1974-02-28 |
| DE2244894A1 (en) | 1973-03-22 |
| LU66054A1 (en) | 1973-03-12 |
| BE788631A (en) | 1973-03-12 |
| FR2152486B1 (en) | 1975-02-07 |
| AR193434A1 (en) | 1973-04-23 |
| BR7206373D0 (en) | 1973-08-23 |
| ES406763A1 (en) | 1975-10-01 |
| FR2152486A1 (en) | 1973-04-27 |