FR942448A - Projection device - Google Patents
Projection deviceInfo
- Publication number
- FR942448A FR942448A FR942448DA FR942448A FR 942448 A FR942448 A FR 942448A FR 942448D A FR942448D A FR 942448DA FR 942448 A FR942448 A FR 942448A
- Authority
- FR
- France
- Prior art keywords
- projection device
- projection
- 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
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US942448XA | 1941-12-06 | 1941-12-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR942448A true FR942448A (en) | 1949-02-08 |
Family
ID=22243984
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR942448D Expired FR942448A (en) | 1941-12-06 | 1946-03-26 | Projection device |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR942448A (en) |
-
1946
- 1946-03-26 FR FR942448D patent/FR942448A/en not_active Expired
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