FR553457A - Téléphone - Google Patents
TéléphoneInfo
- Publication number
- FR553457A FR553457A FR553457DA FR553457A FR 553457 A FR553457 A FR 553457A FR 553457D A FR553457D A FR 553457DA FR 553457 A FR553457 A FR 553457A
- Authority
- FR
- France
- Prior art keywords
- phone
- 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)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Percussion Or Vibration Massage (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US512077A US1523540A (en) | 1921-11-01 | 1921-11-01 | Electromagnetic vibrator |
Publications (1)
Publication Number | Publication Date |
---|---|
FR553457A true FR553457A (fr) | 1923-05-24 |
Family
ID=10107357
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR553457D Expired FR553457A (fr) | 1921-11-01 | 1922-06-29 | Téléphone |
Country Status (3)
Country | Link |
---|---|
US (1) | US1523540A (fr) |
FR (1) | FR553457A (fr) |
GB (1) | GB209118A (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2979691A (en) * | 1943-03-25 | 1961-04-11 | Joseph F Keithley | Microphone for the measurement of transient pressures in a body of water |
US3066200A (en) * | 1958-08-11 | 1962-11-27 | William Ward Jackson | Speaker device |
-
1921
- 1921-11-01 US US512077A patent/US1523540A/en not_active Expired - Lifetime
-
1922
- 1922-06-29 FR FR553457D patent/FR553457A/fr not_active Expired
- 1922-07-01 GB GB18142/22A patent/GB209118A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB209118A (en) | 1924-01-01 |
US1523540A (en) | 1925-01-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR553457A (fr) | Téléphone | |
FR540661A (fr) | Batteur-mélangeur | |
FI8444A (fi) | Strömbrytare | |
FI8473A (fi) | Barkningsjärn | |
FR547478A (fr) | Micro-téléphone combiné | |
SU4304A1 (ru) | Телефонна трансл ци | |
FR544193A (fr) | Exsiccateur-récupérateur | |
FI8563A (fi) | Växellås | |
FI8535A (fi) | Vagnsfjäder | |
FI8685A (fi) | Koppling | |
FI8680A (fi) | Hästsko | |
FI8679A (fi) | Biljettförsäljningsanordning | |
FI8663A (fi) | Säkerhetspropp | |
FI8653A (fi) | Kvicksilvercell | |
FI8649A (fi) | Färgningsmaskin | |
FI8644A (fi) | Rött sprängpulver | |
FI8636A (fi) | Motorsläde | |
FI8630A (fi) | Förbränningsmotor | |
FI8592A (fi) | Rökapparat | |
FI8589A (fi) | Självinställande rullager | |
FI8588A (fi) | Vätskekran | |
FI8584A (fi) | Gödselspridningsapparat | |
FI8575A (fi) | Gasutvecklingsapparat | |
FI8567A (fi) | Elektrisk strömbegränsare | |
FI8712A (fi) | Brevsamlare |