BE439094A - - Google Patents
Info
- Publication number
- BE439094A BE439094A BE439094DA BE439094A BE 439094 A BE439094 A BE 439094A BE 439094D A BE439094D A BE 439094DA BE 439094 A BE439094 A BE 439094A
- 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
- H04R17/00—Piezoelectric transducers; Electrostrictive transducers
- H04R17/04—Gramophone pick-ups using a stylus; Recorders using a stylus
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE218925X | 1939-08-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE439094A true BE439094A (https=) |
Family
ID=5831568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE439094D BE439094A (https=) | 1939-08-07 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE439094A (https=) |
| CH (1) | CH218925A (https=) |
-
0
- BE BE439094D patent/BE439094A/xx unknown
-
1940
- 1940-07-26 CH CH218925D patent/CH218925A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH218925A (de) | 1942-01-15 |