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Pen holder device
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Patent number 4,669,617
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Issue date Jun 2, 1987
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Koh-I-Noor Rapidograph, Inc.
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Juergen Boeckmann
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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Writing instrument with sealing cap
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Patent number 4,558,966
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Issue date Dec 17, 1985
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Koh-I-Noor Rapidograph, Inc.
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Axel Mikuteit
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES
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Technical pen holder
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Patent number 4,548,325
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Issue date Oct 22, 1985
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Koh-I-Noor Rapidograph, Inc.
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Anke Hojer
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B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES