FR992779A - metallic screen - Google Patents
metallic screenInfo
- Publication number
- FR992779A FR992779A FR992779DA FR992779A FR 992779 A FR992779 A FR 992779A FR 992779D A FR992779D A FR 992779DA FR 992779 A FR992779 A FR 992779A
- Authority
- FR
- France
- Prior art keywords
- metallic screen
- metallic
- screen
- 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
- 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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/54—Accessories
- G03B21/56—Projection screens
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT992779X | 1948-08-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR992779A true FR992779A (en) | 1951-10-23 |
Family
ID=11333181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR992779D Expired FR992779A (en) | 1948-08-12 | 1949-08-12 | metallic screen |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR992779A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4155625A (en) * | 1977-12-01 | 1979-05-22 | Schudel Conard R | Reflector construction |
US4277136A (en) * | 1977-12-01 | 1981-07-07 | Schudel Conrad R | Reflector construction |
-
1949
- 1949-08-12 FR FR992779D patent/FR992779A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4155625A (en) * | 1977-12-01 | 1979-05-22 | Schudel Conard R | Reflector construction |
US4277136A (en) * | 1977-12-01 | 1981-07-07 | Schudel Conrad R | Reflector construction |
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