FR562932A - Haut-parleur téléphonique - Google Patents
Haut-parleur téléphoniqueInfo
- Publication number
- FR562932A FR562932A FR562932DA FR562932A FR 562932 A FR562932 A FR 562932A FR 562932D A FR562932D A FR 562932DA FR 562932 A FR562932 A FR 562932A
- Authority
- FR
- France
- Prior art keywords
- speakerphone
- 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
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR562932T | 1923-02-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR562932A true FR562932A (fr) | 1923-11-22 |
Family
ID=8944650
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR562932D Expired FR562932A (fr) | 1923-02-13 | 1923-02-13 | Haut-parleur téléphonique |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR562932A (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3221834A (en) * | 1963-05-09 | 1965-12-07 | Hawley Products Co | Acoustic diaphragm |
-
1923
- 1923-02-13 FR FR562932D patent/FR562932A/fr not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3221834A (en) * | 1963-05-09 | 1965-12-07 | Hawley Products Co | Acoustic diaphragm |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR562932A (fr) | Haut-parleur téléphonique | |
FR562727A (fr) | Téléphone haut-parleur | |
FI9508A (fi) | Vattenspis | |
FI9932A (fi) | Kautschukfilt | |
FI10000A (fi) | Skenspik | |
FI10001A (fi) | Sädestorkningsanordning | |
FI10010A (fi) | Gripredskap | |
FI9504A (fi) | Telefonhållare | |
FI10015A (fi) | Rotfruktsupptagare | |
FI10019A (fi) | Smörjinrättning | |
FI10020A (fi) | Rörförbindning | |
FI10025A (fi) | Minkastare | |
FI9479A (fi) | Förbränningsmotor | |
FI9710A (fi) | Elektrisk mångfald säkerhetspropp | |
FI9704A (fi) | Savutuskoje | |
FI9677A (fi) | Torreldsläckningsapparat | |
FI9669A (fi) | Tröskmaskin | |
FI9666A (fi) | Mjölkningsapparat | |
FI9661A (fi) | Ledat sågblad | |
FI9646A (fi) | Cylindertryckpress | |
FI9634A (fi) | Ritstiftkonstruktion | |
FI9610A (fi) | Papyross-stoppningsmaskin | |
FI9601A (fi) | Flervägsanordning | |
FI9600A (fi) | Utväxlingsanordning | |
FI9579A (fi) | Rotationsångmaskin |