FR850365A - Improvements to sound recording - Google Patents
Improvements to sound recordingInfo
- Publication number
- FR850365A FR850365A FR850365DA FR850365A FR 850365 A FR850365 A FR 850365A FR 850365D A FR850365D A FR 850365DA FR 850365 A FR850365 A FR 850365A
- Authority
- FR
- France
- Prior art keywords
- sound recording
- sound
- recording
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US850365XA | 1938-02-28 | 1938-02-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR850365A true FR850365A (en) | 1939-12-15 |
Family
ID=22189052
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR850365D Expired FR850365A (en) | 1938-02-28 | 1939-02-16 | Improvements to sound recording |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR850365A (en) |
-
1939
- 1939-02-16 FR FR850365D patent/FR850365A/en not_active Expired
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