NL87036C - - Google Patents
Info
- Publication number
- NL87036C NL87036C NL87036DA NL87036C NL 87036 C NL87036 C NL 87036C NL 87036D A NL87036D A NL 87036DA NL 87036 C NL87036 C NL 87036C
- Authority
- NL
- Netherlands
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D17/00—Caps for supporting mine roofs
- E21D17/02—Cantilever extension or similar protecting devices
- E21D17/08—Cap joints for obtaining a coal-face free of pit-props
- E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type
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)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE750706X | 1953-01-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL87036C true NL87036C (en:Method) |
Family
ID=6650691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL87036D NL87036C (en:Method) | 1953-01-17 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE525753A (en:Method) |
| FR (1) | FR1091452A (en:Method) |
| GB (1) | GB750706A (en:Method) |
| NL (1) | NL87036C (en:Method) |
-
0
- BE BE525753D patent/BE525753A/xx unknown
- NL NL87036D patent/NL87036C/xx active
-
1954
- 1954-01-15 GB GB1249/54A patent/GB750706A/en not_active Expired
- 1954-01-15 FR FR1091452D patent/FR1091452A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB750706A (en) | 1956-06-20 |
| BE525753A (en:Method) | |
| FR1091452A (fr) | 1955-04-12 |