FR572314A - Perfectionnements aux lentilles - Google Patents
Perfectionnements aux lentillesInfo
- Publication number
- FR572314A FR572314A FR572314DA FR572314A FR 572314 A FR572314 A FR 572314A FR 572314D A FR572314D A FR 572314DA FR 572314 A FR572314 A FR 572314A
- Authority
- FR
- France
- Prior art keywords
- lentil
- enhancements
- lentil enhancements
- 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
- G03B21/14—Details
- G03B21/20—Lamp housings
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US572314XA | 1922-10-07 | 1922-10-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR572314A true FR572314A (fr) | 1924-06-04 |
Family
ID=22009304
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR572314D Expired FR572314A (fr) | 1922-10-07 | 1923-10-03 | Perfectionnements aux lentilles |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR572314A (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1101011B (de) * | 1955-02-07 | 1961-03-02 | Zeiss Ikon Ag | Optische Einrichtung fuer Projektionszwecke |
-
1923
- 1923-10-03 FR FR572314D patent/FR572314A/fr not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1101011B (de) * | 1955-02-07 | 1961-03-02 | Zeiss Ikon Ag | Optische Einrichtung fuer Projektionszwecke |
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