05311862 is referenced by 193 patents and cites 9 patents.

A face mask includes a cup-shaped body for enclosing an external respiratory organ, such as the nose, of a patient. Flow of a respirable gas into the body and exhaust of expired gas from the body are unidirectional controlled by respiration check valves. A plurality of detachably securable and interchangeable accessory devices adapt the mask for use with selected prior art scavenging devices.

Title
Inhalation apparatus
Application Number
270003
Publication Number
5311862
Application Date
May 4, 1992
Publication Date
May 17, 1994
Inventor
Raymond L Blasdell
691 E. Fairway Dr., Litchfield Park, 85340
AZ, US
Richard J Blasdell
4233 E. Mountain View Rd., Phoenix, 85028
AZ, US
Agent
Lowell W Gresham
Jordan M Meschkow
Don J Flickinger
IPC
A62B 18/02
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