BE358189A - - Google Patents
Info
- Publication number
- BE358189A BE358189A BE358189DA BE358189A BE 358189 A BE358189 A BE 358189A BE 358189D A BE358189D A BE 358189DA BE 358189 A BE358189 A BE 358189A
- 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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB478728A GB311722A (en) | 1928-02-15 | 1928-02-15 | Improvements in and relating to electro magnetic instruments for converting oscillating currents into sound and vice versa |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE358189A true BE358189A (en:Method) |
Family
ID=9783792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE358189D BE358189A (en:Method) | 1928-02-15 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE358189A (en:Method) |
| FR (1) | FR669349A (en:Method) |
| GB (1) | GB311722A (en:Method) |
-
0
- BE BE358189D patent/BE358189A/xx unknown
-
1928
- 1928-02-15 GB GB478728A patent/GB311722A/en not_active Expired
-
1929
- 1929-02-08 FR FR669349D patent/FR669349A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR669349A (fr) | 1929-11-14 |
| GB311722A (en) | 1929-05-15 |