FR679255A - Lightweight sound recording discs - Google Patents
Lightweight sound recording discsInfo
- Publication number
- FR679255A FR679255A FR679255DA FR679255A FR 679255 A FR679255 A FR 679255A FR 679255D A FR679255D A FR 679255DA FR 679255 A FR679255 A FR 679255A
- Authority
- FR
- France
- Prior art keywords
- sound recording
- recording discs
- lightweight sound
- lightweight
- discs
- 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
- G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
- G11B3/68—Record carriers
- G11B3/70—Record carriers characterised by the selection of material or structure; Processes or apparatus specially adapted for manufacturing record carriers
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB679255X | 1928-09-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR679255A true FR679255A (en) | 1930-04-10 |
Family
ID=10492332
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR679255D Expired FR679255A (en) | 1928-09-11 | 1929-07-25 | Lightweight sound recording discs |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR679255A (en) |
-
1929
- 1929-07-25 FR FR679255D patent/FR679255A/en not_active Expired
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