Air conditioning system with electrostatically atomizing...

Air purification device

Apparatus for treating air with electrically charged and uncharg

Argon laser flash exposure of spectrally sensitized silver halid

Bleached holographic material and process for the fabrication th

Christiansen cells containing epoxy gelling agents

Color display of data

Color modifying imaging method and article

Contrast enhancement and small detail blending of photographic i

Controlled angle viewing screens by interference techniques

Device and method for removing undesirable gases and...

Device for collecting dust using highly charged hyperfine...

Driographic imaging method

Dry working black image compositions comprising organic halogen

Dust collector

Dust collector

Dust collector

Dye sensitized dichromated gelatin holographic material

Dynamic electrostatic filter apparatus for purifying air...

Electrostatic atomizing device and humidifier using the same