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US3363338A
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Method and devices for teaching writing skills
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Method and devices for teaching writing skills
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Method and devices for teaching writing skills
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Binding for books
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GB1044012A
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Ring binder construction
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Plastic spine construction for ring binders
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Plastic spine construction for books
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Thickness checking fixture
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Plastic spine construction for books
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Ink roller lubricator
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Spark discharge control means
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Method of drying printed webs
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Printing plate registering apparatus and method
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Air pressure controlled loose plate detector
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Voltage regulator for high voltage power supplies
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Machine for scarfing printing plates
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Photoelectric article detector apparatus
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Scarfing and trimming machine
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Apparatus for registering printing plates
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Electrospark means for perforating webs
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