DS

David A. Schalk

📍 Festus, MO: #3 of 8 inventorsTop 40%
🗺 Missouri: #658 of 2,318 inventorsTop 30%
Overall (2024): #491,003 of 561,600Top 90%
1
Patents 2024

Issued Patents 2024

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
11919553 Railroad switch position indicator — 2024-03-05