Appeal No. 1997-0030
Application No. 08/180,767
Kung’s surgery laser system is similar to appellant’s in
that the objective is to provide a single output laser light
beam having a predetermined mixture of wavelengths, wherein
the relative proportions of the wavelengths may be varied to
achieve a desired result, e.g., cutting and coagulating
(column 1, line 62 through column 2, line 3). The Kung system
includes a solid state Nd:YAG laser 10 in combination with a
Raman laser cell to generate a laser light beam having the
desired wavelengths (column 2, line 52 through column 3, line
17). An output coupling device, such as partially reflective
mirrors M , M and M or a piezo-electrically controlled1 2 3
interference filter, not shown, is employed to vary the
relative proportions of the light of each wavelength (column
4, lines 44-56; column 6, line 44-64).
Given Piper’s objective of producing a pulsed light
output at a particular wavelength (page 1, lines 3-5) in order
to closely match the absorption band of the dye used to label
the tumor to be treated (page 2, lines 5-11), it is apparent
that one of ordinary skill in the art would not provide means
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