NL256544A - - Google Patents
Info
- Publication number
- NL256544A NL256544A NL256544DA NL256544A NL 256544 A NL256544 A NL 256544A NL 256544D A NL256544D A NL 256544DA NL 256544 A NL256544 A NL 256544A
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/44—Refractory linings
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Computer Networks & Wireless Communication (AREA)
- Exchange Systems With Centralized Control (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1211026A GB256544A (en) | 1925-03-31 | 1925-03-31 | Improvements in telephone exchange systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL256544A true NL256544A (en:Method) |
Family
ID=9998553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL256544D NL256544A (en:Method) | 1925-03-31 |
Country Status (3)
| Country | Link |
|---|---|
| FR (1) | FR613686A (en:Method) |
| GB (2) | GB256544A (en:Method) |
| NL (1) | NL256544A (en:Method) |
-
0
- NL NL256544D patent/NL256544A/xx unknown
-
1925
- 1925-03-31 GB GB1211026A patent/GB256544A/en not_active Expired
- 1925-03-31 GB GB858925A patent/GB257307A/en not_active Expired
-
1926
- 1926-03-30 FR FR613686D patent/FR613686A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB256544A (en) | 1926-08-03 |
| FR613686A (fr) | 1926-11-26 |
| GB257307A (en) | 1926-08-31 |