Appeal No. 96-3896
Application No. 08/152,315
(Fed. Cir. 1986). Nevertheless, the combination does not
result in the claimed invention. Hepner does not disclose
means for coupling a group of optical signals ë to a second
k
circulator port as recited in claim 6 and it has not been
established why it would have been obvious to one of ordinary
skill in the art to modify the combined teachings of the prior
art so as to utilize such a group of signals for the single
wavelength signal applied to the second circulator port of
Hepner.
Claim 8 requires no more than two optical signals
and thus, does not distinguish over the combination of Hepner
and Glomb. The two signals of claim 8 are met by the two
signals having wavelengths ë and ë applied at circulator port1 2
1 in Figure 4 of Hepner in the demultiplexing of the two
signals disclosed at column 4, line 58 through column 5, line
6.
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