FR623585A - - Google Patents
Info
- Publication number
- FR623585A FR623585A FR623585DA FR623585A FR 623585 A FR623585 A FR 623585A FR 623585D A FR623585D A FR 623585DA FR 623585 A FR623585 A FR 623585A
- Authority
- FR
- France
- 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)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US64596A US1718337A (en) | 1925-10-24 | 1925-10-24 | Loud-speaker motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR623585A true FR623585A (forum.php) | 1927-06-27 |
Family
ID=22057011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR623585D Expired FR623585A (forum.php) | 1925-10-24 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1718337A (forum.php) |
| FR (1) | FR623585A (forum.php) |
| GB (1) | GB260286A (forum.php) |
-
0
- FR FR623585D patent/FR623585A/fr not_active Expired
-
1925
- 1925-10-24 US US64596A patent/US1718337A/en not_active Expired - Lifetime
-
1926
- 1926-10-21 GB GB26347/26A patent/GB260286A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB260286A (en) | 1927-06-23 |
| US1718337A (en) | 1929-06-25 |