NL68611C - - Google Patents
Info
- Publication number
- NL68611C NL68611C NL68611DA NL68611C NL 68611 C NL68611 C NL 68611C NL 68611D A NL68611D A NL 68611DA NL 68611 C NL68611 C NL 68611C
- 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
- H04R21/00—Variable-resistance transducers
- H04R21/02—Microphones
- H04R21/023—Microphones with more than one granular chamber
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US938782XA | 1941-07-09 | 1941-07-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL68611C true NL68611C (en:Method) |
Family
ID=22241465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL68611D NL68611C (en:Method) | 1941-07-09 |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR938782A (en:Method) |
| NL (1) | NL68611C (en:Method) |
-
0
- NL NL68611D patent/NL68611C/xx active
-
1946
- 1946-11-16 FR FR938782D patent/FR938782A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR938782A (fr) | 1948-10-25 |