Fluorine-containing surfactants and their use in hydrophilic...

Fluoroelastomer coated fuser roll

Fluoropolymer protectant layer for high temperature...

Fly's eye optics for raster output scanner in an...

Focal adjustment on a single-focus lens in a continuously...

Focus adjusting device for optical instruments

Focus adjusting mechanism for cameras

Focus assist system and method

Focus control for optical instruments

Focus control system for interchangeable adjustable focus...

Focus controller of camera

Focus responsive exposure control system

Focused-image hologram system providing increased optical...

Focusing device and method of use thereof for photographic...

Focusing system and method with adjustment for lens depth of...

Focusing system for camera apparatus

Focussing error detecting apparatus

Fog inhibitor for photographic emulsions

Fog inhibitor for photographic emulsions

Fog inhibitor for photographic emulsions