FR999368A - - Google Patents
Info
- Publication number
- FR999368A FR999368A FR999368DA FR999368A FR 999368 A FR999368 A FR 999368A FR 999368D A FR999368D A FR 999368DA FR 999368 A FR999368 A FR 999368A
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
- F21V11/06—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using crossed laminae or strips, e.g. grid-shaped louvers; using lattices or honeycombs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR999368A true FR999368A (de) | 1952-01-31 |
Family
ID=1567305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR999368D Expired FR999368A (de) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR999368A (de) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2710335A (en) * | 1952-12-30 | 1955-06-07 | Cepco Inc | Light diffusing and sound absorbing unit |
| US2913576A (en) * | 1957-03-18 | 1959-11-17 | Curtis Lighting Inc | Louver-diffuser |
| US3129895A (en) * | 1957-08-22 | 1964-04-21 | Holophane Co Inc | Shielding prism |
-
0
- FR FR999368D patent/FR999368A/fr not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2710335A (en) * | 1952-12-30 | 1955-06-07 | Cepco Inc | Light diffusing and sound absorbing unit |
| US2913576A (en) * | 1957-03-18 | 1959-11-17 | Curtis Lighting Inc | Louver-diffuser |
| US3129895A (en) * | 1957-08-22 | 1964-04-21 | Holophane Co Inc | Shielding prism |