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USPTO Patent Rankings Data through Sept 30, 2025
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Pentti Virtanen — 2 Patents in 2002

FOFp-Pigments Oy: 2 patents #1 of 1Top 100%
Toijala, FI: #1 of 1 inventorsTop 100%
Overall (2002): #46,628 of 266,432Top 20%
2 Patents 2002

Issued Patents 2002

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
6475459 Process for preparing calcium carbonate particles 2002-11-05
6416727 Apparatus and process for the preparation of precipitated calcium carbonate 2002-07-09