Interference No. 104,403
time:
I began with an existing lenticular lens sheet which had 4 arc
of circle convex lenses per inch and was approximately 1/4
inch thick. I then took off varying amounts of material off the
apex of the convex lenses, parallel to the sheet, creating
truncated lenses. By so doing, I could “see-through” clearly
to an object beyond the back of the lens when I looked from
a “straight on” viewing position, and at alternative ranges of
viewing, to the left and right, I could then see the print stripe
which were on the back of the sheet.(Rosenthal Record page 36).
23. At some point in time, Rosenthal worked on a lens sheet comprising a parabolic
lens (Rosenthal Record page 37).
24. The ‘226 patent (Exhibit 1001) includes an embodiment in which the lens sheet
includes a parabolic lens (Figs. 4, 5 and 10; col. 9, lines 24-31 and 60-64; col.
12, lines 39-42).
25. Aron Lefkowitz testifies that on May 21, 1993, Rosenthal showed him:
. . . a lens sheet in which I, the viewer could see the sheet
appear as an opaque image material at one angle of view
and then from another angle of view, see the sheet as
transparent, thereby providing a clear view through the sheet
to objects behind it. This lens sheet had a plurality of
parallel lenticulated conic lenses on the viewing side and on
the opposite side had a plurality of spaced-apart, raised
parallel portions with a composite image positioned
thereupon with indented transparent concave lenses in
between which permitted the passage of light. Thereby an
object beneath the sheet at a preselected distance was
viewable through the transparent concave lens portions.
(Rosenthal Record page 17).
26. Lefkowitz also testifies that Rosenthal showed him unique
packaging with his lens sheet used as a window which provided a
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