Back projection system and screen for image projection

Back-lighted copyboard having unique light attenuator

Background photography

Background unfurling apparatus and method

Balanced focus system and method for achieving optimal focus...

Bathythermograph data records production

Battery holder

Beaded rear projection screen with tunable gain

Belt support and tracking apparatus

Bi-axial positioner

Bi-directional pin feed apparatus

Bilayer rear projection screens

Binocular indirect ophthalmoscope with camera

Bite block for dental x-ray procedures

Body-held viewing support for cameras

Body-mounted support device for a camera

Body-mounted support for low elevation camera

Book for storage of transparencies

Bore hole probe recording instrument

Bore-sighted step-and-repeat projection alignment and...