FR700273A - Perfectionnements apportés aux films - Google Patents
Perfectionnements apportés aux filmsInfo
- Publication number
- FR700273A FR700273A FR700273DA FR700273A FR 700273 A FR700273 A FR 700273A FR 700273D A FR700273D A FR 700273DA FR 700273 A FR700273 A FR 700273A
- Authority
- FR
- France
- Prior art keywords
- films
- 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 |
---|---|---|---|
US700273XA | 1929-06-24 | 1929-06-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR700273A true FR700273A (fr) | 1931-02-26 |
Family
ID=22092670
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR700273D Expired FR700273A (fr) | 1929-06-24 | 1930-06-18 | Perfectionnements apportés aux films |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR700273A (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE750776C (de) * | 1930-09-04 | 1945-01-26 | Electrical Res Prod Inc | Einrichtung zur Herstellung einer grundgeraeuscharmen Lichttonaufzeichnung |
DE870481C (de) * | 1931-08-31 | 1953-03-12 | Western Electric Co | Verfahren und Einrichtung zur Herstellung einer Tonfilmaufzeichnung in Intensitaetsschrift |
-
1930
- 1930-06-18 FR FR700273D patent/FR700273A/fr not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE750776C (de) * | 1930-09-04 | 1945-01-26 | Electrical Res Prod Inc | Einrichtung zur Herstellung einer grundgeraeuscharmen Lichttonaufzeichnung |
DE870481C (de) * | 1931-08-31 | 1953-03-12 | Western Electric Co | Verfahren und Einrichtung zur Herstellung einer Tonfilmaufzeichnung in Intensitaetsschrift |
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