BE445825A - - Google Patents
Info
- Publication number
- BE445825A BE445825A BE445825DA BE445825A BE 445825 A BE445825 A BE 445825A BE 445825D A BE445825D A BE 445825DA BE 445825 A BE445825 A BE 445825A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R11/00—Transducers of moving-armature or moving-core type
- H04R11/06—Telephone receivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R11/00—Transducers of moving-armature or moving-core type
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE882404X | 1941-05-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE445825A true BE445825A (zh) | 1942-07-31 |
Family
ID=45351100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE445825D BE445825A (zh) | 1941-05-09 | 1942-06-04 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE445825A (zh) |
| CH (1) | CH226795A (zh) |
| FR (1) | FR882404A (zh) |
-
1942
- 1942-04-29 CH CH226795D patent/CH226795A/de unknown
- 1942-05-28 FR FR882404D patent/FR882404A/fr not_active Expired
- 1942-06-04 BE BE445825D patent/BE445825A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR882404A (fr) | 1943-06-02 |
| CH226795A (de) | 1943-04-30 |