NL23563C - - Google Patents
Info
- Publication number
- NL23563C NL23563C NL23563DA NL23563C NL 23563 C NL23563 C NL 23563C NL 23563D A NL23563D A NL 23563DA NL 23563 C NL23563 C NL 23563C
- 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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1731460X | 1927-10-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL23563C true NL23563C (forum.php) |
Family
ID=10889413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL23563D NL23563C (forum.php) | 1927-10-04 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1731460A (forum.php) |
| FR (1) | FR661129A (forum.php) |
| NL (1) | NL23563C (forum.php) |
-
0
- NL NL23563D patent/NL23563C/xx active
-
1928
- 1928-09-26 US US308367A patent/US1731460A/en not_active Expired - Lifetime
- 1928-09-27 FR FR661129D patent/FR661129A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR661129A (fr) | 1929-07-22 |
| US1731460A (en) | 1929-10-15 |