NL50200C - - Google Patents
Info
- Publication number
- NL50200C NL50200C NL50200DA NL50200C NL 50200 C NL50200 C NL 50200C NL 50200D A NL50200D A NL 50200DA NL 50200 C NL50200 C NL 50200C
- 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
- H04R11/00—Transducers of moving-armature or moving-core type
- H04R11/06—Telephone receivers
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB206838A GB509837A (en) | 1938-01-21 | 1938-01-21 | Improvements in or relating to sound reproducing devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL50200C true NL50200C (en:Method) |
Family
ID=9733014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL50200D NL50200C (en:Method) | 1938-01-21 |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB509837A (en:Method) |
| NL (1) | NL50200C (en:Method) |
-
0
- NL NL50200D patent/NL50200C/xx active
-
1938
- 1938-01-21 GB GB206838A patent/GB509837A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB509837A (en) | 1939-07-21 |