BE523142A - - Google Patents
Info
- Publication number
- BE523142A BE523142A BE523142DA BE523142A BE 523142 A BE523142 A BE 523142A BE 523142D A BE523142D A BE 523142DA BE 523142 A BE523142 A BE 523142A
- Authority
- BE
- Belgium
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Emergency Alarm Devices (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB710853A GB759852A (en) | 1953-03-14 | 1953-03-14 | Improvements in or relating to electrically operated signalling systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE523142A true BE523142A (en:Method) |
Family
ID=9826756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE523142D BE523142A (en:Method) | 1953-03-14 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE523142A (en:Method) |
| FR (1) | FR1085295A (en:Method) |
| GB (1) | GB759852A (en:Method) |
-
0
- BE BE523142D patent/BE523142A/xx unknown
-
1953
- 1953-03-14 GB GB710853A patent/GB759852A/en not_active Expired
- 1953-10-20 FR FR1085295D patent/FR1085295A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1085295A (fr) | 1955-01-31 |
| GB759852A (en) | 1956-10-24 |