NL54831C - - Google Patents
Info
- Publication number
- NL54831C NL54831C NL54831DA NL54831C NL 54831 C NL54831 C NL 54831C NL 54831D A NL54831D A NL 54831DA NL 54831 C NL54831 C NL 54831C
- 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
- H04R21/026—Microphones in which the sound is perpendicular to the current crossing the transducer material
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1935S0119731 DE702071C (de) | 1935-09-12 | 1935-09-12 | Kohlemikrofon nach dem Querstromprinzip mit konzentrisch angeordneten Elektroden |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL54831C true NL54831C (enrdf_load_html_response) |
Family
ID=7534980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL54831D NL54831C (enrdf_load_html_response) | 1935-09-12 |
Country Status (3)
| Country | Link |
|---|---|
| CH (1) | CH202672A (enrdf_load_html_response) |
| DE (1) | DE702071C (enrdf_load_html_response) |
| NL (1) | NL54831C (enrdf_load_html_response) |
-
0
- NL NL54831D patent/NL54831C/xx active
-
1935
- 1935-09-12 DE DE1935S0119731 patent/DE702071C/de not_active Expired
-
1937
- 1937-09-13 CH CH202672D patent/CH202672A/de unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE702071C (de) | 1941-01-29 |
| CH202672A (de) | 1939-01-31 |