FR661622A - Système de haut-parleur - Google Patents
Système de haut-parleurInfo
- Publication number
- FR661622A FR661622A FR661622DA FR661622A FR 661622 A FR661622 A FR 661622A FR 661622D A FR661622D A FR 661622DA FR 661622 A FR661622 A FR 661622A
- Authority
- FR
- France
- Prior art keywords
- speaker system
- speaker
- 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
- H04R11/00—Transducers of moving-armature or moving-core type
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE294877T | 1927-07-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR661622A true FR661622A (fr) | 1929-07-27 |
Family
ID=31894088
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR661622D Expired FR661622A (fr) | 1927-07-30 | 1928-05-19 | Système de haut-parleur |
Country Status (4)
Country | Link |
---|---|
US (1) | US1716893A (fr) |
BE (1) | BE351040A (fr) |
FR (1) | FR661622A (fr) |
GB (1) | GB294877A (fr) |
-
0
- BE BE351040D patent/BE351040A/xx unknown
-
1928
- 1928-05-19 FR FR661622D patent/FR661622A/fr not_active Expired
- 1928-06-28 GB GB18724/28A patent/GB294877A/en not_active Expired
- 1928-07-25 US US295272A patent/US1716893A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
BE351040A (fr) | |
GB294877A (fr) | 1929-08-15 |
US1716893A (en) | 1929-06-11 |
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