BE457012A - - Google Patents
Info
- Publication number
- BE457012A BE457012A BE457012DA BE457012A BE 457012 A BE457012 A BE 457012A BE 457012D A BE457012D A BE 457012DA BE 457012 A BE457012 A BE 457012A
- 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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/08—Microphones
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 |
|---|---|---|---|
| DE259863X | 1943-08-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE457012A true BE457012A (en:Method) |
Family
ID=5966915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE457012D BE457012A (en:Method) | 1943-08-28 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE457012A (en:Method) |
| CH (1) | CH259863A (en:Method) |
| FR (1) | FR905352A (en:Method) |
-
0
- BE BE457012D patent/BE457012A/xx unknown
-
1944
- 1944-05-22 CH CH259863D patent/CH259863A/de unknown
- 1944-06-23 FR FR905352D patent/FR905352A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH259863A (de) | 1949-02-15 |
| FR905352A (fr) | 1945-12-03 |