FR542557A - Improvements to gas masks - Google Patents
Improvements to gas masksInfo
- Publication number
- FR542557A FR542557A FR542557DA FR542557A FR 542557 A FR542557 A FR 542557A FR 542557D A FR542557D A FR 542557DA FR 542557 A FR542557 A FR 542557A
- Authority
- FR
- France
- Prior art keywords
- gas masks
- masks
- gas
- 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
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
- A62B18/02—Masks
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Zoology (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR542557T | 1921-10-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR542557A true FR542557A (en) | 1922-08-17 |
Family
ID=8930965
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR542557D Expired FR542557A (en) | 1921-10-20 | 1921-10-20 | Improvements to gas masks |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR542557A (en) |
-
1921
- 1921-10-20 FR FR542557D patent/FR542557A/en not_active Expired
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