FR404417A - - Google Patents
Info
- Publication number
- FR404417A FR404417A FR404417DA FR404417A FR 404417 A FR404417 A FR 404417A FR 404417D A FR404417D A FR 404417DA FR 404417 A FR404417 A FR 404417A
- 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.)
- Active
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
- H04R21/00—Variable-resistance transducers
- H04R21/04—Gramophone pick-ups using a stylus; Recorders using a stylus
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE220904T |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR404417A true FR404417A (cs) |
Family
ID=5837146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR404417D Active FR404417A (cs) |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE220904C (cs) |
| FR (1) | FR404417A (cs) |
-
0
- DE DENDAT220904D patent/DE220904C/de active Active
- FR FR404417D patent/FR404417A/fr active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE220904C (cs) |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE220904C (cs) |