BE378889A - - Google Patents
Info
- Publication number
- BE378889A BE378889A BE378889DA BE378889A BE 378889 A BE378889 A BE 378889A BE 378889D A BE378889D A BE 378889DA BE 378889 A BE378889 A BE 378889A
- 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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH158672T | 1931-07-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE378889A true BE378889A (en]) |
Family
ID=4412633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE378889D BE378889A (en]) | 1931-07-24 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE378889A (en]) |
| CH (1) | CH158672A (en]) |
-
0
- BE BE378889D patent/BE378889A/xx unknown
-
1931
- 1931-07-24 CH CH158672D patent/CH158672A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH158672A (fr) | 1932-11-30 |