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The ornamental design for a tracheostomy air filtration device, as shown.
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FIG. 1 is a back view of the invention.
FIG. 2 is a front view of the invention.
FIG. 3 is the top view of the invention.
FIG. 4 is bottom view of the invention.
FIG. 5 is the right side view of the invention; and,
FIG. 6 is the left side view of the invention.
| Patent | Priority | Assignee | Title |
| Patent | Priority | Assignee | Title |
| 4955373, | Oct 16 1989 | Air breathing assembly and air filter attachment therein | |
| D429811, | Jan 20 1999 | Ventilating intubating laryngeal mask airway |
| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Apr 30 2004 | HAAS, EILEEN | MOL AIRWAYS, LLC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 021502 | /0378 |
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