GB171720A - Improvements in face masks - Google Patents
Improvements in face masksInfo
- Publication number
- GB171720A GB171720A GB1436820A GB1436820A GB171720A GB 171720 A GB171720 A GB 171720A GB 1436820 A GB1436820 A GB 1436820A GB 1436820 A GB1436820 A GB 1436820A GB 171720 A GB171720 A GB 171720A
- Authority
- GB
- United Kingdom
- Prior art keywords
- face masks
- masks
- face
- 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
Landscapes
- Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1436820A GB171720A (en) | 1920-05-26 | 1920-05-26 | Improvements in face masks |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1436820A GB171720A (en) | 1920-05-26 | 1920-05-26 | Improvements in face masks |
Publications (1)
Publication Number | Publication Date |
---|---|
GB171720A true GB171720A (en) | 1921-11-28 |
Family
ID=10039944
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1436820A Expired GB171720A (en) | 1920-05-26 | 1920-05-26 | Improvements in face masks |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB171720A (en) |
-
1920
- 1920-05-26 GB GB1436820A patent/GB171720A/en not_active Expired
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