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John B. Spelz, Sr.

📍 Boulder, CO: #3,183 of 5,018 inventorsTop 65%
🗺 Colorado: #24,093 of 40,980 inventorsTop 60%
Overall (All Time): #3,757,188 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5574829 Method and apparatus for producing needlework canvas Elizabeth Wallace 1996-11-12