FR643850A - - Google Patents
Info
- Publication number
- FR643850A FR643850A FR643850DA FR643850A FR 643850 A FR643850 A FR 643850A FR 643850D A FR643850D A FR 643850DA FR 643850 A FR643850 A FR 643850A
- 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
- F21V5/00—Refractors for light sources
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR643850A true FR643850A (fr) | 1928-09-24 |
Family
ID=1542743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR643850D Expired FR643850A (fr) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR643850A (fr) |
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0
- FR FR643850D patent/FR643850A/fr not_active Expired