JPS50155106A - - Google Patents
Info
- Publication number
- JPS50155106A JPS50155106A JP49123984A JP12398474A JPS50155106A JP S50155106 A JPS50155106 A JP S50155106A JP 49123984 A JP49123984 A JP 49123984A JP 12398474 A JP12398474 A JP 12398474A JP S50155106 A JPS50155106 A JP S50155106A
- Authority
- JP
- Japan
- 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.)
- Granted
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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Amplifiers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US410776A US3873980A (en) | 1973-10-29 | 1973-10-29 | Sound communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS50155106A true JPS50155106A (it) | 1975-12-15 |
| JPS5419123B2 JPS5419123B2 (it) | 1979-07-12 |
Family
ID=23626167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12398474A Expired JPS5419123B2 (it) | 1973-10-29 | 1974-10-29 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3873980A (it) |
| JP (1) | JPS5419123B2 (it) |
| CA (1) | CA1006825A (it) |
| DE (1) | DE2450118A1 (it) |
| FR (1) | FR2248959A1 (it) |
| IT (1) | IT1025224B (it) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02113699A (ja) * | 1988-10-22 | 1990-04-25 | Sasaki Denki Seisakusho:Kk | サイレンアンプ |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4040050A (en) * | 1972-01-07 | 1977-08-02 | Nunn Jr Ewing D | Emergency vehicle audible warning system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3747092A (en) * | 1971-12-07 | 1973-07-17 | Carson Mfg Co Inc | Electronic siren circuit |
-
1973
- 1973-10-29 US US410776A patent/US3873980A/en not_active Expired - Lifetime
-
1974
- 1974-10-22 DE DE19742450118 patent/DE2450118A1/de not_active Withdrawn
- 1974-10-28 FR FR7435955A patent/FR2248959A1/fr not_active Withdrawn
- 1974-10-28 IT IT28826/74A patent/IT1025224B/it active
- 1974-10-28 CA CA212,380A patent/CA1006825A/en not_active Expired
- 1974-10-29 JP JP12398474A patent/JPS5419123B2/ja not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02113699A (ja) * | 1988-10-22 | 1990-04-25 | Sasaki Denki Seisakusho:Kk | サイレンアンプ |
Also Published As
| Publication number | Publication date |
|---|---|
| CA1006825A (en) | 1977-03-15 |
| US3873980A (en) | 1975-03-25 |
| DE2450118A1 (de) | 1975-04-30 |
| IT1025224B (it) | 1978-08-10 |
| JPS5419123B2 (it) | 1979-07-12 |
| FR2248959A1 (it) | 1975-05-23 |