NL3740C - - Google Patents
Info
- Publication number
- NL3740C NL3740C NL3740DA NL3740C NL 3740 C NL3740 C NL 3740C NL 3740D A NL3740D A NL 3740DA NL 3740 C NL3740 C NL 3740C
- 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
- H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
- H04R23/002—Transducers other than those covered by groups H04R9/00 - H04R21/00 using electrothermic-effect transducer
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
- Communication Cables (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL114418X | 1917-03-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL3740C true NL3740C (https=) |
Family
ID=32294140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL3740D NL3740C (https=) | 1917-03-27 |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE314664C (https=) |
| FR (1) | FR488967A (https=) |
| GB (1) | GB114418A (https=) |
| NL (1) | NL3740C (https=) |
-
0
- NL NL3740D patent/NL3740C/xx active
- DE DENDAT314664D patent/DE314664C/de active Active
-
1918
- 1918-02-04 GB GB2018/18A patent/GB114418A/en not_active Expired
- 1918-02-19 FR FR488967A patent/FR488967A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR488967A (fr) | 1918-12-03 |
| GB114418A (en) | 1918-04-18 |
| DE314664C (https=) |