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FR2493225A1
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Stylographic unit for automatic or similar stylographic machines
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IT8149162D0
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Composite plastic and metal draughting compasses
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JPS5185824A
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Hitsukyooyobi seizuyoenpitsuno hishoseishinnarabini sonoseizohoho
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US3787980A
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Compasses with releasable points
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GB1186119A
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A Device for Attaching a Drawing Implement to Compasses.
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GB1212117A
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A device for sharpening a writing element
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US3427114A
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Fine-line writing marker
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GB1075646A
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Improvements in or relating to pencil lead sharpeners
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US2933065A
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Gripping member for propeller pencils
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US2682476A
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Mixture for manufacture of pencil leads
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ES163271A1
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A fountain pen
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ES163270A1
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A stylographic feather with an aspiration symbol on a tubular plunger stem and provided with a thread
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GB467555A
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Improved process for producing graphite writing and drawing leads
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GB415930A
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An improved process for making leads for writing, drawing, colour work, and the like
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US2016807A
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Improved black writing pencil leads
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GB402959A
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An improved process for making writing and marking leads
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GB367694A
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Improvements in and relating to the manufacture of pencils and the like
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CA520155A
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Manufacture of writing and drawing leads
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