CH545523A - - Google Patents

Info

Publication number: CH545523A
Authority: CH; Switzerland

Application number

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1972-12-18

Filing date

1972-12-18

Publication date

1974-01-31

1972-12-18 Application filed filed Critical

1974-01-31 Publication of CH545523A publication Critical patent/CH545523A/xx

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)
Diaphragms For Electromechanical Transducers (AREA)
Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

CH545523D 1972-12-18 1972-12-18 CH545523A (zh)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
CH1840472		1972-12-18

Publications (1)

Publication Number	Publication Date
CH545523A true CH545523A (zh)	1974-01-31

Family

ID=4432765

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CH545523D CH545523A (zh)	1972-12-18	1972-12-18

Country Status (4)

Country	Link
BE (1)	BE808777A (zh)
CH (1)	CH545523A (zh)
FR (1)	FR2211161A5 (zh)
IT (1)	IT1000328B (zh)

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
IT1000328B (it)	1976-03-30
FR2211161A5 (en)	1974-07-12

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Legal Events

Date	Code	Title	Description
1977-07-29	PL	Patent ceased