NL68610C - - Google Patents
Info
- Publication number
- NL68610C NL68610C NL68610DA NL68610C NL 68610 C NL68610 C NL 68610C NL 68610D A NL68610D A NL 68610DA NL 68610 C NL68610 C NL 68610C
- 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
- H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US376094A US2298764A (en) | 1941-01-27 | 1941-01-27 | Sound translating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL68610C true NL68610C (it) |
Family
ID=23483682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL68610D NL68610C (it) | 1941-01-27 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2298764A (it) |
| FR (1) | FR938781A (it) |
| NL (1) | NL68610C (it) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2493734A (en) * | 1945-05-23 | 1950-01-03 | Sonotone Corp | Magnetic insert earphone insertable in the ear of the user |
| US2540487A (en) * | 1946-10-19 | 1951-02-06 | Bell Telephone Labor Inc | Electroacoustic transducer |
| US2486837A (en) * | 1948-12-11 | 1949-11-01 | Avco Mfg Corp | Magnetic assembly for permanent magnet type loudspeakers |
| US3113186A (en) * | 1962-02-06 | 1963-12-03 | Walter E Heller & Company | Telephone device |
| TWM508867U (zh) * | 2015-04-24 | 2015-09-11 | Jetvox Acoustic Corp | 中心降噪喇叭結構 |
-
0
- NL NL68610D patent/NL68610C/xx active
-
1941
- 1941-01-27 US US376094A patent/US2298764A/en not_active Expired - Lifetime
-
1946
- 1946-11-16 FR FR938781D patent/FR938781A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR938781A (fr) | 1948-10-25 |
| US2298764A (en) | 1942-10-13 |