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US2011000094A1
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Compass having a leg joint and information bearing surfaces
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DE102009017149A1
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Circle with leg joint and a spindle protection body for its adjusting spindle
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DE102007017558A1
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Circle with leg joint and information carrier surfaces
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FR2884754A1
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COMPASS COMPRISING A BRANCH JOINT AND INFORMATION SUPPORT SURFACES
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DE4201854A1
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Bearing for the adjustment spindle of a compass
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DE4119136A1
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Hinge joint for two-part compass calipers - has one part with two tabs, enclosing slot, consisting of plastics, corners of all tabs have been cut away
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