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Helmut Doll

📍 Spechbach, DE: #5 of 8 inventorsTop 65%
Overall (All Time): #3,937,578 of 4,157,543Top 95%
1
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Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4865479 Writing utensil with an exchangeable eraser — 1989-09-12