Half toning method and apparatus for solid area coverage

Hand held motion picture viewer

Hand held motion picture viewer

Hand held transparency projector with simple advance mechanism

Hand-held remote control and display system for film and...

Handheld electronic device and camera providing flash...

Harness system for attaching camera to user

Head up visual display apparatus

Health information card

Heat convection cooling system for optical readout and...

Heat shield device for a reproducing apparatus

Heat-sensitive copying device

Heat-sensitive copying-paper

Heater for thermographic reproduction device

Heating device for heating a glass surface, particularly a...

Hemispherical motion picture screen

High brightness directional viewing screen

High definition screen

High density optical memory storage means employing a...

High efficiency colour x-ray imaging system