FR56458E - - Google Patents
Info
- Publication number
- FR56458E FR56458E FR56458DA FR56458E FR 56458 E FR56458 E FR 56458E FR 56458D A FR56458D A FR 56458DA FR 56458 E FR56458 E FR 56458E
- 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
- 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
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR56458E true FR56458E (xx) | 1952-10-08 |
Family
ID=1363505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR56458D Expired FR56458E (xx) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR56458E (xx) |
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0
- FR FR56458D patent/FR56458E/fr not_active Expired