BE545243A - - Google Patents
Info
- Publication number
- BE545243A BE545243A BE545243DA BE545243A BE 545243 A BE545243 A BE 545243A BE 545243D A BE545243D A BE 545243DA BE 545243 A BE545243 A BE 545243A
- Authority
- BE
- Belgium
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
- C22B1/10—Roasting processes in fluidised form
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/738—Interface circuits for coupling substations to external telephone lines
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Signal Processing (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Telephonic Communication Services (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE795831X | 1955-02-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE545243A true BE545243A (xx) |
Family
ID=20339769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE545243D BE545243A (xx) | 1955-02-17 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2915592A (xx) |
| BE (1) | BE545243A (xx) |
| FR (1) | FR1142117A (xx) |
| GB (1) | GB795831A (xx) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1907660A (en) * | 1930-03-12 | 1933-05-09 | Siemens Ag | Telephone substation circuit |
| US1993780A (en) * | 1931-02-11 | 1935-03-12 | Bell Telephone Labor Inc | Telephone substation equipment |
| BE435545A (xx) * | 1938-07-22 | |||
| US2341711A (en) * | 1942-09-02 | 1944-02-15 | Bell Telephone Labor Inc | Telephone circuit |
| US2394275A (en) * | 1942-12-04 | 1946-02-05 | Autophon Ag | Device for switching-in and disconnecting signal apparatus |
| NL77436C (xx) * | 1947-11-04 |
-
0
- BE BE545243D patent/BE545243A/xx unknown
-
1956
- 1956-01-31 US US562541A patent/US2915592A/en not_active Expired - Lifetime
- 1956-02-06 GB GB3671/56A patent/GB795831A/en not_active Expired
- 1956-02-17 FR FR1142117D patent/FR1142117A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2915592A (en) | 1959-12-01 |
| FR1142117A (fr) | 1957-09-13 |
| GB795831A (en) | 1958-05-28 |