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US2006227463A1
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Suspension assembly with molded structures
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US4765768A
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Ring binding mechanism
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US4732468A
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Registry device for transparencies for overhead projector
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US4498746A
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Extension platform to support transparencies for an overhead projector
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CA1125066A
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Extension platform to support transparencies for an overhead projector
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US3956798A
|
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Flexible binding
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DE2425546A1
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Pull off picture or design stored in book - is cut from printed plastics foil pressed onto paper support
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DE2418764A1
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Illuminated display screen for transparent pages - incorporates supply mechanism for constantly changing transparent sheets
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US3924879A
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Flexible film transparency display makers
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US3895453A
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Accessory storage and projection apparatus for visual communications
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CA944646A
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Accessory storage and projection apparatus for visual communication
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US3667145A
|
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Color and motion animations for transparencies
|
|
US3661449A
|
|
Overhead visual shutter device
|
|
US3524703A
|
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Transparency storage and display device for an overhead projector
|
|
GB1172711A
|
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Projection Stage Apparatus.
|
|
US3334540A
|
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Transparency registering device for the stage of a visual image projector
|
|
US3317151A
|
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Projection stage apparatus
|
|
US3253358A
|
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Visual teaching system
|
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US2553028A
|
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Guide for postioning x-ray lamps
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US2477778A
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Electric air heater
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