BE381615A - - Google Patents
Info
- Publication number
- BE381615A BE381615A BE381615DA BE381615A BE 381615 A BE381615 A BE 381615A BE 381615D A BE381615D A BE 381615DA BE 381615 A BE381615 A BE 381615A
- 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
- H04R21/00—Variable-resistance transducers
- H04R21/02—Microphones
- H04R21/021—Microphones with granular resistance material
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE740504X | 1931-07-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE381615A true BE381615A (ja) |
Family
ID=3879431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE381615D BE381615A (ja) | 1931-07-27 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE381615A (ja) |
| FR (1) | FR740504A (ja) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1003263B (de) * | 1953-01-05 | 1957-02-28 | Krone Kg | Elektrodenanordnung fuer mit Kohlegriess gefuellte Sprechkapseln |
-
0
- BE BE381615D patent/BE381615A/xx unknown
-
1932
- 1932-07-26 FR FR740504D patent/FR740504A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR740504A (fr) | 1933-01-27 |