BE381522A - - Google Patents
Info
- Publication number
- BE381522A BE381522A BE381522DA BE381522A BE 381522 A BE381522 A BE 381522A BE 381522D A BE381522D A BE 381522DA BE 381522 A BE381522 A BE 381522A
- 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
- H04R11/08—Gramophone pick-ups using a stylus; Recorders using a stylus
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL391418X | 1930-07-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE381522A true BE381522A (en:Method) |
Family
ID=19785794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE381522D BE381522A (en:Method) | 1930-07-31 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE381522A (en:Method) |
| FR (1) | FR720528A (en:Method) |
| GB (1) | GB391418A (en:Method) |
-
0
- BE BE381522D patent/BE381522A/xx unknown
-
1931
- 1931-07-20 GB GB20710/31A patent/GB391418A/en not_active Expired
- 1931-07-23 FR FR720528D patent/FR720528A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR720528A (fr) | 1932-02-20 |
| GB391418A (en) | 1933-04-27 |