04481944 is referenced by 98 patents and cites 7 patents.

Apparatus and method for assisting a person's respiration by means of application of a series of high pressure air pulses to the person. The frequency of the pulses is varied over some range of frequencies to ensure that at least during some portion of the time, air pulses are applied to the person at the natural or resonant frequency of the person's respiratory system.

Title
Apparatus and method for assisting respiration
Application Number
6/322742
Publication Number
4481944
Application Date
November 19, 1981
Publication Date
November 13, 1984
Inventor
J Bert Bunnell
Salt Lake City
UT, US
Agent
Thorpe North & Western
Assignee
Bunnell Life Systems
UT, US
IPC
A61B 7/00
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