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Frits Johan Blok

Overall (All Time): #3,720,991 of 4,157,543Top 90%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5651682 Sticks and method for consulting chinese book of changes Wilhelmus Jacobus Marinus Zonjee 1997-07-29