FR867850A - Electro-acoustic systems - Google Patents
Electro-acoustic systemsInfo
- Publication number
- FR867850A FR867850A FR867850DA FR867850A FR 867850 A FR867850 A FR 867850A FR 867850D A FR867850D A FR 867850DA FR 867850 A FR867850 A FR 867850A
- Authority
- FR
- France
- Prior art keywords
- electro
- acoustic systems
- acoustic
- systems
- 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 |
---|---|---|---|
US867850XA | 1941-01-23 | 1941-01-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR867850A true FR867850A (en) | 1941-11-29 |
Family
ID=22200895
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR867850D Expired FR867850A (en) | 1941-01-23 | 1940-11-29 | Electro-acoustic systems |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR867850A (en) |
-
1940
- 1940-11-29 FR FR867850D patent/FR867850A/en not_active Expired
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