Appeal No. 1997-0030
Application No. 08/180,767
Implicit in the above is the examiner’s determination that the
thus modified device of Piper would correspond to the subject
matter of claim 1 is all respects.
Piper, the examiner’s primary reference, is directed to a
dye laser “intended for the production of a pulsed light
output at a particular wave length” (page 1, lines 3-5). One
particular application of the dye laser of Piper is in the
treatment of tumors previously labeled with suitable dyes
(page 1, lines 22-29). In this situation, the wavelength
“must be chosen within narrow limits established by the need
to obtain adequate penetration of the tissue and by the fact
that the wavelength must lie within the absorption band of the
dye used to label the tumor” (page 2, lines 6-9). To this
end, Piper teaches a means for controlling the output of a
laser by preferentially stimulating the emission of a
particular wavelength (page 4, lines 27-33). In particular,
Piper provides a single laser discharge tube containing
different active media (e.g., copper and gold) such that the
output of the tube contains frequencies characteristic of each
media. In one example, illustrated in Figure 2, Piper
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