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John Rene Spronken

📍 Calgary, CA: #38 of 618 inventorsTop 7%
Overall (2018): #70,031 of 503,207Top 15%
3
Patents 2018

Issued Patents 2018

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
D835878 Crane base 2018-12-11
10139037 Prefabricated reusable concrete pedestal element 2018-11-27
D811208 Crane base fastener 2018-02-27