NL20171C - - Google Patents
Info
- Publication number
- NL20171C NL20171C NL20171DA NL20171C NL 20171 C NL20171 C NL 20171C NL 20171D A NL20171D A NL 20171DA NL 20171 C NL20171 C NL 20171C
- 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
- H04R11/02—Loudspeakers
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3011525A GB266271A (en) | 1925-11-28 | 1925-11-28 | Improvements in or relating to telephone loud speakers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL20171C true NL20171C (de) |
Family
ID=10302513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL20171D NL20171C (de) | 1925-11-28 |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE480366C (de) |
| FR (1) | FR623916A (de) |
| GB (1) | GB266271A (de) |
| NL (1) | NL20171C (de) |
-
0
- NL NL20171D patent/NL20171C/xx active
-
1925
- 1925-11-28 GB GB3011525A patent/GB266271A/en not_active Expired
-
1926
- 1926-10-29 FR FR623916D patent/FR623916A/fr not_active Expired
- 1926-10-31 DE DEB128039D patent/DE480366C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR623916A (fr) | 1927-07-04 |
| DE480366C (de) | 1929-08-01 |
| GB266271A (en) | 1927-02-24 |