Appeal 2006-3333
Application 10/324,601
INTRODUCTION
Appellant invented an apparatus and method for writing in air
(Specification 2). Appellant’s method includes creating a field of airborne
luminescent particles and tracing a visible path through said field by using a
wand that changes the intensity of at least some of the airborne particles by
causing a chemical reaction (Specification 2). The chemical reaction is
initiated by using the wand to apply an activator to the luminescent particles
such that the particles’ luminescence changes (Specification 6: 18-25). The
apparatus includes a particle generator for creating an airborne field of
luminescent particles, a source of activating agent for causing a chemical
reaction to change a luminance of some of the luminescent particles and a
handheld wand for emitting the particles and activating agent for causing a
chemical reaction while the wand is used to write in the air (Specification 2,
6). Claims 1, 18, 29, 32, and 40 are illustrative:
1. An air writing system, comprising:
(a) a particle seeding subsystem, including:
(i) a reservoir of luminescent particles;
(ii) a sprayer configured to access said luminescent
particles in said reservoir to create a buoyant field of said luminescent
particles; and
(b) a source of activating agent for changing a luminance of
some of said luminescent particles within said buoyant field by
causing a chemical reaction;
(c) a handheld wand for writing in said field, including
2
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