FR546789A - - Google Patents
Info
- Publication number
- FR546789A FR546789A FR546789DA FR546789A FR 546789 A FR546789 A FR 546789A FR 546789D A FR546789D A FR 546789DA FR 546789 A FR546789 A FR 546789A
- 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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/04—Plane diaphragms
- H04R7/06—Plane diaphragms comprising a plurality of sections or layers
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Percussion Or Vibration Massage (AREA)
- Manufacture Of Motors, Generators (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3494521A GB199749A (en) | 1921-12-29 | 1921-12-29 | Methods of producing laminated oscillatory bodies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR546789A true FR546789A (en) | 1922-11-23 |
Family
ID=10371902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR546789D Expired FR546789A (en) | 1921-12-29 |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR546789A (en) |
| GB (1) | GB199749A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2428951A1 (en) * | 1978-06-15 | 1980-01-11 | Sony Corp | LOUDSPEAKER AND MANUFACTURING METHOD |
-
0
- FR FR546789D patent/FR546789A/fr not_active Expired
-
1921
- 1921-12-29 GB GB3494521A patent/GB199749A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2428951A1 (en) * | 1978-06-15 | 1980-01-11 | Sony Corp | LOUDSPEAKER AND MANUFACTURING METHOD |
Also Published As
| Publication number | Publication date |
|---|---|
| GB199749A (en) | 1923-06-29 |