BE389124A - - Google Patents
Info
- Publication number
- BE389124A BE389124A BE389124DA BE389124A BE 389124 A BE389124 A BE 389124A BE 389124D A BE389124D A BE 389124DA BE 389124 A BE389124 A BE 389124A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/42—Combinations of transducers with fluid-pressure or other non-electrical amplifying means
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Details Of Valves (AREA)
- Golf Clubs (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US543341A US1935185A (en) | 1931-06-10 | 1931-06-10 | Sound producing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE389124A true BE389124A (https=) |
Family
ID=24167593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE389124D BE389124A (https=) | 1931-06-10 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1935185A (https=) |
| BE (1) | BE389124A (https=) |
| DE (1) | DE651418C (https=) |
| GB (1) | GB388269A (https=) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5936480B2 (ja) * | 1976-02-10 | 1984-09-04 | ソニー株式会社 | スピ−カ装置 |
-
0
- BE BE389124D patent/BE389124A/xx unknown
-
1931
- 1931-06-10 US US543341A patent/US1935185A/en not_active Expired - Lifetime
-
1932
- 1932-06-10 GB GB16477/32A patent/GB388269A/en not_active Expired
- 1932-06-11 DE DER85131D patent/DE651418C/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE651418C (de) | 1937-10-13 |
| US1935185A (en) | 1933-11-14 |
| GB388269A (en) | 1933-02-23 |