FR742855A - - Google Patents
Info
- Publication number
- FR742855A FR742855A FR742855DA FR742855A FR 742855 A FR742855 A FR 742855A FR 742855D A FR742855D A FR 742855DA FR 742855 A FR742855 A FR 742855A
- 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
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B27/00—Photographic printing apparatus
- G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
- G03B27/34—Means for automatic focusing therefor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR742855A true FR742855A (xx) | 1933-03-18 |
Family
ID=1547196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR742855D Expired FR742855A (xx) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR742855A (xx) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE767750C (de) * | 1933-02-28 | 1953-07-06 | Rca Corp | Schaltungsanordnung zur Wiedereinfuehrung der mittleren Bildhelligkeit in Fernsehempfaengern mit Braunscher Roehre |
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0
- FR FR742855D patent/FR742855A/fr not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE767750C (de) * | 1933-02-28 | 1953-07-06 | Rca Corp | Schaltungsanordnung zur Wiedereinfuehrung der mittleren Bildhelligkeit in Fernsehempfaengern mit Braunscher Roehre |