4. Coating implements with material supply
  5. Solid material for rubbing contact or support therefor
  6. Including means to limit tool projection

Engelbert Brunner

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Automatic lead advancing mechanism for a mechanical pencil

Coating implements with material supply – Solid material for rubbing contact or support therefor – Including means to limit tool projection
Patent

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Automatic pencil device for automatic drafting and writing machi

Recorders – Markers and/or driving means therefor – Stylus feature
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Profile ID: LFUS-PAI-P-837244

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