NL17658C - - Google Patents
Info
- Publication number
- NL17658C NL17658C NL17658DA NL17658C NL 17658 C NL17658 C NL 17658C NL 17658D A NL17658D A NL 17658DA NL 17658 C NL17658 C NL 17658C
- 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
- H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB602147X | 1924-08-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL17658C true NL17658C (ref) |
Family
ID=10485224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL17658D NL17658C (ref) | 1924-08-26 |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR602147A (ref) |
| NL (1) | NL17658C (ref) |
-
0
- NL NL17658D patent/NL17658C/xx active
-
1925
- 1925-08-18 FR FR602147D patent/FR602147A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR602147A (fr) | 1926-03-12 |