Masking device for overhead projector
Masking device for use with image projectors
Masking of light valve spill light
Masking-amount guide device for stereo slide
Maskless exposure system
Material exhibiting apparatus
Material selective device
Measuring convergence alignment of a projection system
Mechanical convergence fixture apparatus and method
Mechanical convergence fixture apparatus and method
Mechanical sound reproducing means for an audio-visual device
Mechanically adjustable thermal path for projection display...
Mechanism for controlling the advance of a magazine in a transpa
Mechanism for transporting a slide from a long magazine into the
Media projector system
Mediacube
Melding mask
MEMS device deflection stop
Merchandise display case and system
Merchandise display case and system