NL20179C - - Google Patents
Info
- Publication number
- NL20179C NL20179C NL20179DA NL20179C NL 20179 C NL20179 C NL 20179C NL 20179D A NL20179D A NL 20179DA NL 20179 C NL20179 C NL 20179C
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R11/00—Transducers of moving-armature or moving-core type
- H04R11/02—Loudspeakers
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US263477XA | 1925-12-22 | 1925-12-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL20179C true NL20179C (fr) |
Family
ID=21831299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL20179D NL20179C (fr) | 1925-12-22 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1730507A (fr) |
| BE (1) | BE338782A (fr) |
| FR (1) | FR616502A (fr) |
| GB (1) | GB263477A (fr) |
| NL (1) | NL20179C (fr) |
-
0
- BE BE338782D patent/BE338782A/xx unknown
- NL NL20179D patent/NL20179C/xx active
- US US1730507D patent/US1730507A/en not_active Expired - Lifetime
-
1926
- 1926-04-13 GB GB9732/26A patent/GB263477A/en not_active Expired
- 1926-05-22 FR FR616502D patent/FR616502A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE338782A (fr) | |
| FR616502A (fr) | 1927-02-03 |
| US1730507A (en) | 1929-10-08 |
| GB263477A (en) | 1927-07-13 |