NL27089C - - Google Patents
Info
- Publication number
- NL27089C NL27089C NL27089DA NL27089C NL 27089 C NL27089 C NL 27089C NL 27089D A NL27089D A NL 27089DA NL 27089 C NL27089 C NL 27089C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R11/00—Transducers of moving-armature or moving-core type
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEI34064D DE471811C (de) | 1928-04-04 | 1928-04-04 | Lautsprecher-System mit magnetisch neutralem, sich um seine Mittelachse drehendem Anker |
| DEI35186D DE481259C (de) | 1928-04-04 | 1928-08-10 | Lautsprechersystem mit magnetisch neutralem, sich um seine Mittelachse drehendem Anker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL27089C true NL27089C (ja�@�@) |
Family
ID=25981483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL27089D NL27089C (ja�@�@) | 1928-04-04 |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH137793A (ja�@�@) |
| DE (1) | DE481259C (ja�@�@) |
| FR (1) | FR668893A (ja�@�@) |
| NL (1) | NL27089C (ja�@�@) |
-
0
- NL NL27089D patent/NL27089C/xx active
-
1928
- 1928-08-10 DE DEI35186D patent/DE481259C/de not_active Expired
-
1929
- 1929-02-02 FR FR668893D patent/FR668893A/fr not_active Expired
- 1929-02-09 CH CH137793D patent/CH137793A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR668893A (fr) | 1929-11-07 |
| CH137793A (de) | 1930-01-31 |
| DE481259C (de) | 1929-08-16 |