FR558788A - Appareil téléphonique - Google Patents
Appareil téléphoniqueInfo
- Publication number
- FR558788A FR558788A FR558788DA FR558788A FR 558788 A FR558788 A FR 558788A FR 558788D A FR558788D A FR 558788DA FR 558788 A FR558788 A FR 558788A
- Authority
- FR
- France
- Prior art keywords
- telephone device
- telephone
- 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)
- Electromagnets (AREA)
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US57086922 US1452850A (en) | 1922-06-26 | 1922-06-26 | of brooklyn |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR558788A true FR558788A (fr) | 1923-09-03 |
Family
ID=10308531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR558788D Expired FR558788A (fr) | 1922-06-26 | 1922-11-17 | Appareil téléphonique |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US1452850A (fr) |
| CH (1) | CH104444A (fr) |
| DE (1) | DE399753C (fr) |
| FR (1) | FR558788A (fr) |
| GB (1) | GB208330A (fr) |
| NL (1) | NL13437C (fr) |
-
1922
- 1922-06-26 US US57086922 patent/US1452850A/en not_active Expired - Lifetime
- 1922-10-07 DE DESCH66063D patent/DE399753C/de not_active Expired
- 1922-11-07 GB GB30493/22A patent/GB208330A/en not_active Expired
- 1922-11-14 NL NL23204A patent/NL13437C/xx active
- 1922-11-15 CH CH104444D patent/CH104444A/fr unknown
- 1922-11-17 FR FR558788D patent/FR558788A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB208330A (en) | 1923-12-20 |
| DE399753C (de) | 1924-07-29 |
| CH104444A (fr) | 1924-05-01 |
| US1452850A (en) | 1923-04-24 |
| NL13437C (fr) | 1925-08-15 |
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