Appeal No. 1998-2815
Application No. 08/648,790
determination must be made. The first program is a complex
expert system that includes databases and libraries for use by
an expert to create a simpler program to be used by a non-
expert, the simpler program asks specific questions of the
non-expert and displays a decision or suggested questions to
ask an expert. Hayward provides an example of use in a
medical field to help a patient determine a course of action
and/or suggested questions to ask the doctor, see Figures 14-
28. We find nothing in Hayward that makes reference to a
respirator or a method of selecting a respirator on the basis
of a first and second chemical.
With respect to Grilk, we understand Grilk to teach a
Carbon Monoxide (CO) monitor that includes a sensor for
determining the concentration of carbon monoxide present, an
LED for displaying the concentration and a microprocessor for
calculating the health hazard to a person occasioned by the
level of carbon monoxhemoglobin in the blood of that person
resulting from breathing the known/determined concentrations
of CO over a period of time. Like Hayward, Grilk makes no
reference to a respirator or a method of selecting a
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