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Class Information
Number: 128/200.27
Name: Surgery > Respiratory method or device > Gas stream directed away from face mask to penetrate contaminated atmosphere
Description: Subject matter wherein a gas stream is directed away from a face mask to penetrate a contaminated atmosphere, usually for the purpose of enabling the user of the face mask to see clearly.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7549420 |
Protective headgear equipment with respirator and optical shield |
Jun. 23, 2009 |
| 7481220 |
Breathing mask with breathing gas supply through the strap |
Jan. 27, 2009 |
| 7481221 |
Breathing mask with integrated suction area |
Jan. 27, 2009 |
| 7191778 |
Respiratory mask with an air-impermeable shield |
Mar. 20, 2007 |
| 7036502 |
Air curtain device |
May. 2, 2006 |
| 6843717 |
Automobile vent extender |
Jan. 18, 2005 |
| 6615828 |
Flow indicator device for respirators |
Sep. 9, 2003 |
| 6394091 |
Breathing apparatus |
May. 28, 2002 |
| 6302105 |
Apparatus for supplying breathable gas |
Oct. 16, 2001 |
| 5048516 |
Respiratory mask |
Sep. 17, 1991 |
| 5046492 |
Clean room helmet system |
Sep. 10, 1991 |
| 4799477 |
Rebreathing mask |
Jan. 24, 1989 |
| 4353292 |
Assembly for storing and facilitating application of breathing devices |
Oct. 12, 1982 |
| 4276877 |
Respiratory method and apparatus |
Jul. 7, 1981 |
| 4258710 |
Mask-type respirator |
Mar. 31, 1981 |
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