CH545523A - - Google Patents
Info
- Publication number
- CH545523A CH545523A CH545523DA CH545523A CH 545523 A CH545523 A CH 545523A CH 545523D A CH545523D A CH 545523DA CH 545523 A CH545523 A CH 545523A
- Authority
- CH
- Switzerland
Links
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/18—Methods or devices for transmitting, conducting or directing sound
- G10K11/26—Sound-focusing or directing, e.g. scanning
- G10K11/28—Sound-focusing or directing, e.g. scanning using reflection, e.g. parabolic reflectors
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1840472 | 1972-12-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH545523A true CH545523A (forum.php) | 1974-01-31 |
Family
ID=4432765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH545523D CH545523A (forum.php) | 1972-12-18 | 1972-12-18 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE808777A (forum.php) |
| CH (1) | CH545523A (forum.php) |
| FR (1) | FR2211161A5 (forum.php) |
| IT (1) | IT1000328B (forum.php) |
-
1972
- 1972-12-18 CH CH545523D patent/CH545523A/xx not_active IP Right Cessation
-
1973
- 1973-12-14 IT IT5430673A patent/IT1000328B/it active
- 1973-12-14 FR FR7344754A patent/FR2211161A5/fr not_active Expired
- 1973-12-18 BE BE138994A patent/BE808777A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BE808777A (fr) | 1974-04-16 |
| FR2211161A5 (en) | 1974-07-12 |
| IT1000328B (it) | 1976-03-30 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased |