BE367768A - - Google Patents
Info
- Publication number
- BE367768A BE367768A BE367768DA BE367768A BE 367768 A BE367768 A BE 367768A BE 367768D A BE367768D A BE 367768DA BE 367768 A BE367768 A BE 367768A
- 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
- 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)
- Diaphragms For Electromechanical Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2015169X | 1929-03-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE367768A true BE367768A (ja�@�@) |
Family
ID=19873498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE367768D BE367768A (ja�@�@) | 1929-03-02 |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2015169A (ja�@�@) |
| BE (1) | BE367768A (ja�@�@) |
-
0
- BE BE367768D patent/BE367768A/xx unknown
-
1930
- 1930-01-25 US US423324A patent/US2015169A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2015169A (en) | 1935-09-24 |