FR397077A - Parleur à air comprimé - Google Patents
Parleur à air compriméInfo
- Publication number
- FR397077A FR397077A FR397077DA FR397077A FR 397077 A FR397077 A FR 397077A FR 397077D A FR397077D A FR 397077DA FR 397077 A FR397077 A FR 397077A
- Authority
- FR
- France
- Prior art keywords
- compressed air
- air speaker
- speaker
- compressed
- air
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
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
- H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR397077T | 1908-12-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR397077A true FR397077A (fr) | 1909-04-28 |
Family
ID=1442171
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR397077D Expired FR397077A (fr) | 1908-12-04 | 1908-12-04 | Parleur à air comprimé |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR397077A (fr) |
-
1908
- 1908-12-04 FR FR397077D patent/FR397077A/fr not_active Expired
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