BE347740A - - Google Patents
Info
- Publication number
- BE347740A BE347740A BE347740DA BE347740A BE 347740 A BE347740 A BE 347740A BE 347740D A BE347740D A BE 347740DA BE 347740 A BE347740 A BE 347740A
- 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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
- H04R7/14—Non-planar diaphragms or cones corrugated, pleated or ribbed
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US159554A US1763054A (en) | 1927-01-07 | 1927-01-07 | Loud-speaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE347740A true BE347740A (https=) |
Family
ID=22573035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE347740D BE347740A (https=) | 1927-01-07 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US1763054A (https=) |
| BE (1) | BE347740A (https=) |
| FR (1) | FR646684A (https=) |
| GB (1) | GB283211A (https=) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3114429A (en) * | 1961-01-16 | 1963-12-17 | Hoffman Electronics Corp | Loudspeaker |
-
0
- BE BE347740D patent/BE347740A/xx unknown
-
1927
- 1927-01-07 US US159554A patent/US1763054A/en not_active Expired - Lifetime
-
1928
- 1928-01-02 GB GB32/28A patent/GB283211A/en not_active Expired
- 1928-01-03 FR FR646684D patent/FR646684A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR646684A (fr) | 1928-11-14 |
| GB283211A (en) | 1928-06-28 |
| US1763054A (en) | 1930-06-10 |