4. Special receptacle or package
  5. Structural features for vertical stacking, i.e., similar...
  6. Having vertical projecting element or recess for interlock

Richard K. Bergquist

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Stackable and reversible trays for storing drawing sheets, paper

Special receptacle or package – Structural features for vertical stacking – i.e. – similar... – Having vertical projecting element or recess for interlock
Patent

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Stackable tray for paper stock and drawings

Office supplies; artists and teachers materials – Office equipment not elsewhere specified – Holder or file
Patent

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Profile ID: LFUS-PAI-P-994398

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