DH

Donald M. Haarstad

📍 Champlin, MN: #6 of 20 inventorsTop 30%
🗺 Minnesota: #1,731 of 5,562 inventorsTop 35%
Overall (2025): #402,273 of 469,880Top 90%
1
Patents 2025

Issued Patents 2025

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
12256845 Adjustable firmness mattress system Philip J. Haarstad, Molly Haarstad, Alexander Haarstad, Benjamin Haarstad, Connie Marie Haarstad +10 more 2025-03-25