FR56446E - - Google Patents
Info
- Publication number
- FR56446E FR56446E FR56446DA FR56446E FR 56446 E FR56446 E FR 56446E FR 56446D A FR56446D A FR 56446DA FR 56446 E FR56446 E FR 56446E
- 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
-
- 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
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR56446E true FR56446E (pm) | 1952-10-07 |
Family
ID=1363498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR56446D Expired FR56446E (pm) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR56446E (pm) |
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0
- FR FR56446D patent/FR56446E/fr not_active Expired