Appeal No. 2002-1849 Page 13
Application No. 09/116,710
an embossed hologram as the holographic diffuser to holograph-
ically illuminate the image, we agree with appellants (brief,
page 8) that Branca does not disclose the display of a holo-
graphic image on a holographic screen. Note that we construe the
"surface" of the screen to be the front surface of the screen
viewed by an observer.
We are not persuaded by the examiner's assertion (answer,
page 9) that Branca (col. 3, lines 20-54) clearly shows the
property of "an intrinsic coloration which is one of black, grey
and a dark color." We find that the passage referred to by the
examiner refers to countering the effects of color tainting by
incorporating coloring materials, which with the reflective
holographic diffuser, results in the image being perceived by a
user as substantially achromatic illumination. The passage
additionally discloses, inter alia, that the combined application
of a reflective holographic diffuser and the coloring material
can achieve similar utility in virtually any image-providing
display, and that the invention provides a chromatically-
adjusted, holographically illuminated display viewable under
ambient light without the requirement of a supplemental internal
light. Thus, we find no teaching or disclosure for the
limitation of an intrinsic coloration which is one of black, grey
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