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John Joseph Sopkowiak

MC Marvin Lumber And Cedar Company: 2 patents #22 of 56Top 40%
📍 Williams, MN: #2 of 2 inventorsTop 100%
🗺 Minnesota: #23,881 of 52,454 inventorsTop 50%
Overall (All Time): #2,011,374 of 4,157,543Top 50%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
9404288 Window opening control device for horizontal and vertical sliding windows Daniel Jon Curtis 2016-08-02
8776440 Sash limiter apparatus and method David M. Lund 2014-07-15