NL9167C - - Google Patents
Info
- Publication number
- NL9167C NL9167C NL9167DA NL9167C NL 9167 C NL9167 C NL 9167C NL 9167D A NL9167D A NL 9167DA NL 9167 C NL9167 C NL 9167C
- 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
- H04R21/021—Microphones with granular resistance material
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
- H04R13/02—Telephone receivers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electromagnetism (AREA)
- Inert Electrodes (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US432599XA | 1910-07-09 | 1910-07-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL9167C true NL9167C (en) |
Family
ID=19905453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL9167D NL9167C (en) | 1910-07-09 |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE379221C (en) |
| FR (2) | FR432599A (en) |
| NL (1) | NL9167C (en) |
-
0
- FR FR20051A patent/FR20051E/en not_active Expired
- NL NL9167D patent/NL9167C/xx active
-
1911
- 1911-07-06 FR FR432599A patent/FR432599A/en not_active Expired
-
1920
- 1920-05-20 DE DEB94124D patent/DE379221C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR432599A (en) | 1911-12-09 |
| DE379221C (en) | 1923-08-18 |
| FR20051E (en) | 1916-03-22 |