FR955570A - - Google Patents
Info
- Publication number
- FR955570A FR955570A FR955570DA FR955570A FR 955570 A FR955570 A FR 955570A FR 955570D A FR955570D A FR 955570DA FR 955570 A FR955570 A FR 955570A
- Authority
- FR
- France
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR955570A true FR955570A (un) | 1950-01-17 |
Family
ID=1558273
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR955570D Expired FR955570A (un) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR955570A (un) |
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0
- FR FR955570D patent/FR955570A/fr not_active Expired