DS

Douglas J. Sproal

📍 Anaheim, CA: #477 of 1,337 inventorsTop 40%
🗺 California: #185,134 of 386,348 inventorsTop 50%
Overall (All Time): #2,029,076 of 4,157,543Top 50%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
9033488 Easy load printer media spindle Matthew Raymond Erickson 2015-05-19
8471878 Sign maker templates for producing centered labels and methods of use George Francis Unger, IV, Matthew Raymond Erickson 2013-06-25