NL59387C - - Google Patents
Info
- Publication number
- NL59387C NL59387C NL59387DA NL59387C NL 59387 C NL59387 C NL 59387C NL 59387D A NL59387D A NL 59387DA NL 59387 C NL59387 C NL 59387C
- 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
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/033—Headphones for stereophonic communication
- H04R5/0335—Earpiece support, e.g. headbands or neckrests
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 |
|---|---|---|---|
| CH883805X | 1940-12-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL59387C true NL59387C (forum.php) |
Family
ID=4545091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL59387D NL59387C (forum.php) | 1940-12-23 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE443899A (forum.php) |
| CH (1) | CH219812A (forum.php) |
| FR (1) | FR883805A (forum.php) |
| NL (1) | NL59387C (forum.php) |
-
0
- NL NL59387D patent/NL59387C/xx active
- BE BE443899D patent/BE443899A/xx unknown
-
1940
- 1940-12-23 CH CH219812D patent/CH219812A/de unknown
-
1941
- 1941-12-18 FR FR883805D patent/FR883805A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR883805A (fr) | 1943-07-20 |
| BE443899A (forum.php) | |
| CH219812A (de) | 1942-02-28 |