NL31209C - - Google Patents
Info
- Publication number
- NL31209C NL31209C NL31209DA NL31209C NL 31209 C NL31209 C NL 31209C NL 31209D A NL31209D A NL 31209DA NL 31209 C NL31209 C NL 31209C
- 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
- H04R7/26—Damping by means acting directly on free portion of diaphragm or cone
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE697904X | 1929-06-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL31209C true NL31209C (OSRAM) |
Family
ID=6608052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL31209D NL31209C (OSRAM) | 1929-06-26 |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR697904A (OSRAM) |
| NL (1) | NL31209C (OSRAM) |
-
0
- NL NL31209D patent/NL31209C/xx active
-
1930
- 1930-06-25 FR FR697904D patent/FR697904A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR697904A (fr) | 1931-01-23 |