NL20311C - - Google Patents
Info
- Publication number
- NL20311C NL20311C NL20311DA NL20311C NL 20311 C NL20311 C NL 20311C NL 20311D A NL20311D A NL 20311DA NL 20311 C NL20311 C NL 20311C
- 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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Reciprocating Pumps (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US71990A US1588545A (en) | 1925-11-28 | 1925-11-28 | Electromagnetic driver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL20311C true NL20311C (en:Method) |
Family
ID=22104871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL20311D NL20311C (en:Method) | 1925-11-28 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1588545A (en:Method) |
| GB (1) | GB257203A (en:Method) |
| NL (1) | NL20311C (en:Method) |
-
0
- NL NL20311D patent/NL20311C/xx active
-
1925
- 1925-11-28 US US71990A patent/US1588545A/en not_active Expired - Lifetime
-
1926
- 1926-04-30 GB GB11387/26A patent/GB257203A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1588545A (en) | 1926-06-15 |
| GB257203A (en) | 1926-08-26 |