FR534040A - Safety lamps improvements - Google Patents
Safety lamps improvementsInfo
- Publication number
- FR534040A FR534040A FR534040DA FR534040A FR 534040 A FR534040 A FR 534040A FR 534040D A FR534040D A FR 534040DA FR 534040 A FR534040 A FR 534040A
- Authority
- FR
- France
- Prior art keywords
- safety lamps
- lamps
- safety
- lamps improvements
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
- F21L23/00—Non-electric hand-lamps for miners
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR534040T | 1919-11-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR534040A true FR534040A (en) | 1922-03-16 |
Family
ID=8925273
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR534040D Expired FR534040A (en) | 1919-11-28 | 1919-11-28 | Safety lamps improvements |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR534040A (en) |
-
1919
- 1919-11-28 FR FR534040D patent/FR534040A/en not_active Expired
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