BE361147A - - Google Patents
Info
- Publication number
- BE361147A BE361147A BE361147DA BE361147A BE 361147 A BE361147 A BE 361147A BE 361147D A BE361147D A BE 361147DA BE 361147 A BE361147 A BE 361147A
- 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)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US284772A US1777271A (en) | 1928-06-12 | 1928-06-12 | Electromagnetic sound reproducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE361147A true BE361147A (enrdf_load_stackoverflow) |
Family
ID=23091470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE361147D BE361147A (enrdf_load_stackoverflow) | 1928-06-12 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1777271A (enrdf_load_stackoverflow) |
| BE (1) | BE361147A (enrdf_load_stackoverflow) |
| FR (1) | FR676035A (enrdf_load_stackoverflow) |
| GB (1) | GB313484A (enrdf_load_stackoverflow) |
-
0
- BE BE361147D patent/BE361147A/xx unknown
-
1928
- 1928-06-12 US US284772A patent/US1777271A/en not_active Expired - Lifetime
-
1929
- 1929-01-14 GB GB1317/29A patent/GB313484A/en not_active Expired
- 1929-06-01 FR FR676035D patent/FR676035A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB313484A (en) | 1930-01-30 |
| US1777271A (en) | 1930-09-30 |
| FR676035A (fr) | 1930-02-18 |