FR686958A - Speakerphone - Google Patents
SpeakerphoneInfo
- Publication number
- FR686958A FR686958A FR686958DA FR686958A FR 686958 A FR686958 A FR 686958A FR 686958D A FR686958D A FR 686958DA FR 686958 A FR686958 A FR 686958A
- 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
- 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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE686958X | 1929-11-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR686958A true FR686958A (en) | 1930-08-01 |
Family
ID=6598154
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR686958D Expired FR686958A (en) | 1929-11-09 | 1929-12-19 | Speakerphone |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR686958A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3062926A (en) * | 1959-03-20 | 1962-11-06 | John J Ronci | Magnet with vibratable armature |
-
1929
- 1929-12-19 FR FR686958D patent/FR686958A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3062926A (en) * | 1959-03-20 | 1962-11-06 | John J Ronci | Magnet with vibratable armature |
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