BE372442A - - Google Patents
Info
- Publication number
- BE372442A BE372442A BE372442DA BE372442A BE 372442 A BE372442 A BE 372442A BE 372442D A BE372442D A BE 372442DA BE 372442 A BE372442 A BE 372442A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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 |
|---|---|---|---|
| NL355919X | 1929-09-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE372442A true BE372442A (ja�@�@) |
Family
ID=19785222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE372442D BE372442A (ja�@�@) | 1929-09-27 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1961180A (ja�@�@) |
| BE (1) | BE372442A (ja�@�@) |
| FR (1) | FR700120A (ja�@�@) |
| GB (1) | GB355919A (ja�@�@) |
-
0
- BE BE372442D patent/BE372442A/xx unknown
-
1930
- 1930-08-05 FR FR700120D patent/FR700120A/fr not_active Expired
- 1930-08-05 GB GB23424/30A patent/GB355919A/en not_active Expired
- 1930-09-12 US US481448A patent/US1961180A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US1961180A (en) | 1934-06-05 |
| FR700120A (fr) | 1931-02-24 |
| GB355919A (en) | 1931-09-03 |