BE349785A - - Google Patents
Info
- Publication number
- BE349785A BE349785A BE349785DA BE349785A BE 349785 A BE349785 A BE 349785A BE 349785D A BE349785D A BE 349785DA BE 349785 A BE349785 A BE 349785A
- 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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT1808238X | 1928-02-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE349785A true BE349785A (fr) |
Family
ID=3689007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE349785D BE349785A (fr) | 1928-02-02 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1808238A (fr) |
| BE (1) | BE349785A (fr) |
| GB (1) | GB311461A (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102172045A (zh) * | 2009-12-25 | 2011-08-31 | 日本先锋公司 | 扬声器用振动体、扬声器装置 |
-
0
- BE BE349785D patent/BE349785A/xx unknown
-
1928
- 1928-02-13 GB GB4553/28A patent/GB311461A/en not_active Expired
- 1928-08-28 US US302466A patent/US1808238A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| GB311461A (en) | 1929-05-13 |
| US1808238A (en) | 1931-06-02 |