Appeal No. 2000-1201 Page 5
Application No. 08/817,825
(Examiner’s Answer at 4-5.) The appellants argue, "the
Loiseaux et al spatial filter has no teaching or fair
suggestion of the claimed tuning to a predetermined wavelength
relative to the suggested use of an attenuator." (Reply Br.
at 2.)
In deciding obviousness, “[a]nalysis begins with a key
legal question -- what is the invention claimed?” Panduit
Corp. v. Dennison Mfg. Co., 810 F.2d 1561, 1567, 1 USPQ2d
1593, 1597 (Fed. Cir. 1987). Here, claim 10 specifies in
pertinent part the following limitations: "at least one
chromatic modulation device being tuned to a predetermined
wavelength and transmitting a predetermined portion of light
energy which it receives at said predetermined wavelength to
said display screen. . . ." Accordingly, the claim requires
inter alia a chromatic modulator tuned to a wavelength and
transmitting a portion of light that it receives at the
wavelength.
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