BE354603A - - Google Patents
Info
- Publication number
- BE354603A BE354603A BE354603DA BE354603A BE 354603 A BE354603 A BE 354603A BE 354603D A BE354603D A BE 354603DA BE 354603 A BE354603 A BE 354603A
- 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
- H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
- H04R13/02—Telephone receivers
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE661145X | 1927-10-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE354603A true BE354603A (en:Method) |
Family
ID=20314339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE354603D BE354603A (en:Method) | 1927-10-01 |
Country Status (2)
| Country | Link |
|---|---|
| BE (1) | BE354603A (en:Method) |
| FR (1) | FR661145A (en:Method) |
-
0
- BE BE354603D patent/BE354603A/xx unknown
-
1928
- 1928-09-27 FR FR661145D patent/FR661145A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR661145A (fr) | 1929-07-22 |