ZA804431B - Improvements in or relating to telephone handsets - Google Patents
Improvements in or relating to telephone handsetsInfo
- Publication number
- ZA804431B ZA804431B ZA00804431A ZA804431A ZA804431B ZA 804431 B ZA804431 B ZA 804431B ZA 00804431 A ZA00804431 A ZA 00804431A ZA 804431 A ZA804431 A ZA 804431A ZA 804431 B ZA804431 B ZA 804431B
- Authority
- ZA
- South Africa
- Prior art keywords
- relating
- telephone handsets
- handsets
- telephone
- Prior art date
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Telephone Function (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7925970 | 1979-07-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ZA804431B true ZA804431B (en) | 1981-08-26 |
Family
ID=10506767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ZA00804431A ZA804431B (en) | 1979-07-25 | 1980-07-23 | Improvements in or relating to telephone handsets |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS5650654A (en) |
| AU (1) | AU536058B2 (en) |
| BR (1) | BR8004586A (en) |
| CA (1) | CA1160782A (en) |
| CH (1) | CH654704A5 (en) |
| PT (1) | PT71559A (en) |
| ZA (1) | ZA804431B (en) |
-
1980
- 1980-07-15 AU AU60414/80A patent/AU536058B2/en not_active Ceased
- 1980-07-16 PT PT71559A patent/PT71559A/en unknown
- 1980-07-23 ZA ZA00804431A patent/ZA804431B/en unknown
- 1980-07-23 BR BR8004586A patent/BR8004586A/en unknown
- 1980-07-24 JP JP10183180A patent/JPS5650654A/en active Pending
- 1980-07-24 CH CH5655/80A patent/CH654704A5/en not_active IP Right Cessation
- 1980-07-25 CA CA000356996A patent/CA1160782A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| PT71559A (en) | 1980-08-01 |
| JPS5650654A (en) | 1981-05-07 |
| CA1160782A (en) | 1984-01-17 |
| AU536058B2 (en) | 1984-04-19 |
| BR8004586A (en) | 1981-02-03 |
| AU6041480A (en) | 1981-01-29 |
| CH654704A5 (en) | 1986-02-28 |
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