NL4057C - - Google Patents
Info
- Publication number
- NL4057C NL4057C NL4057DA NL4057C NL 4057 C NL4057 C NL 4057C NL 4057D A NL4057D A NL 4057DA NL 4057 C NL4057 C NL 4057C
- 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
- 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)
- Resistance Heating (AREA)
- Connector Housings Or Holding Contact Members (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL109797X | 1916-09-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL4057C true NL4057C (forum.php) |
Family
ID=32294124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL4057D NL4057C (forum.php) | 1916-09-15 |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE310385C (forum.php) |
| FR (1) | FR487624A (forum.php) |
| GB (1) | GB109797A (forum.php) |
| NL (1) | NL4057C (forum.php) |
-
0
- DE DENDAT310385D patent/DE310385C/de active Active
- NL NL4057D patent/NL4057C/xx active
-
1917
- 1917-08-18 GB GB11867/17A patent/GB109797A/en not_active Expired
- 1917-09-14 FR FR487624A patent/FR487624A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE310385C (forum.php) | |
| GB109797A (en) | 1917-10-25 |
| FR487624A (fr) | 1918-07-17 |