FR744199A - - Google Patents
Info
- Publication number
- FR744199A FR744199A FR744199DA FR744199A FR 744199 A FR744199 A FR 744199A FR 744199D A FR744199D A FR 744199DA FR 744199 A FR744199 A FR 744199A
- 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
- H04R11/08—Gramophone pick-ups using a stylus; Recorders using a stylus
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Motor Or Generator Frames (AREA)
- Vibration Prevention Devices (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE387974X | 1931-11-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR744199A true FR744199A (fr) | 1933-04-13 |
Family
ID=6371215
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR744199D Expired FR744199A (fr) | 1931-11-23 |
Country Status (3)
Country | Link |
---|---|
US (1) | US1980137A (fr) |
FR (1) | FR744199A (fr) |
GB (1) | GB387974A (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2496484A (en) * | 1946-04-17 | 1950-02-07 | Massa Frank | Magnetostrictive phonograph pickup |
US2585040A (en) * | 1949-03-23 | 1952-02-12 | Frederick Hart & Co Inc | Electromagnetic recording head |
US2769038A (en) * | 1952-11-29 | 1956-10-30 | Orton Melvern | Phonograph pickup and the like |
-
0
- FR FR744199D patent/FR744199A/fr not_active Expired
-
1932
- 1932-10-18 GB GB29159/32A patent/GB387974A/en not_active Expired
- 1932-10-25 US US639507A patent/US1980137A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US1980137A (en) | 1934-11-06 |
GB387974A (en) | 1933-02-16 |