H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 5/74 (2006.01) G03B 21/132 (2006.01) G03B 21/14 (2006.01)
Patent
CA 2501214
An overhead projection system comprises a generally horizontal projector assembly and a display screen having a display surface disposed beneath the projector assembly. The projector assembly includes a projector aimed to project images onto the display surface of the display screen. At least one tether acts between the projector assembly and at least one structural element above the projector assembly.
Sim & Mcburney
Smart Technologies Inc.
Smart Technologies Ulc
LandOfFree
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