NL27769C - - Google Patents
Info
- Publication number
- NL27769C NL27769C NL27769DA NL27769C NL 27769 C NL27769 C NL 27769C NL 27769D A NL27769D A NL 27769DA NL 27769 C NL27769 C NL 27769C
- Authority
- NL
- Netherlands
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
- H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEW79281D DE557366C (de) | 1928-05-05 | 1928-05-05 | Lautsprecher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL27769C true NL27769C (zh) |
Family
ID=10155069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL27769D NL27769C (zh) | 1928-05-05 |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE358783A (zh) |
| DE (1) | DE557366C (zh) |
| FR (1) | FR659604A (zh) |
| GB (1) | GB314691A (zh) |
| NL (1) | NL27769C (zh) |
-
0
- BE BE358783D patent/BE358783A/xx unknown
- NL NL27769D patent/NL27769C/xx active
-
1928
- 1928-05-05 DE DEW79281D patent/DE557366C/de not_active Expired
- 1928-07-19 GB GB2097828A patent/GB314691A/en not_active Expired
- 1928-08-28 FR FR659604D patent/FR659604A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE557366C (de) | 1932-08-22 |
| GB314691A (en) | 1929-07-04 |
| BE358783A (zh) | |
| FR659604A (fr) | 1929-07-03 |