DS

Derrick J. Silver

📍 Letchworth, GB: #34 of 64 inventorsTop 55%
Overall (All Time): #4,073,956 of 4,157,543Top 100%
1
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Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4343559 Retractable mechanism for a writing element — 1982-08-10