KR900003893U - 무정전 차임벨 앰프 - Google Patents
무정전 차임벨 앰프Info
- Publication number
- KR900003893U KR900003893U KR2019880011971U KR880011971U KR900003893U KR 900003893 U KR900003893 U KR 900003893U KR 2019880011971 U KR2019880011971 U KR 2019880011971U KR 880011971 U KR880011971 U KR 880011971U KR 900003893 U KR900003893 U KR 900003893U
- Authority
- KR
- South Korea
- Prior art keywords
- chime
- uninterruptible
- amplifier
- uninterruptible chime
- chime amplifier
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
- H03F3/183—Low-frequency amplifiers, e.g. audio preamplifiers with semiconductor devices only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Electric Clocks (AREA)
- Stand-By Power Supply Arrangements (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019880011971U KR900010796Y1 (ko) | 1988-07-25 | 1988-07-25 | 무정전 차임벨 앰프 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019880011971U KR900010796Y1 (ko) | 1988-07-25 | 1988-07-25 | 무정전 차임벨 앰프 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR900003893U true KR900003893U (ko) | 1990-02-08 |
| KR900010796Y1 KR900010796Y1 (ko) | 1990-11-30 |
Family
ID=19277785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019880011971U KR900010796Y1 (ko) | 1988-07-25 | 1988-07-25 | 무정전 차임벨 앰프 |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR900010796Y1 (ko) |
-
1988
- 1988-07-25 KR KR2019880011971U patent/KR900010796Y1/ko active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| KR900010796Y1 (ko) | 1990-11-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| E701 | Decision to grant or registration of patent right | ||
| NORF | Unpaid initial registration fee |