DR

Donald J. Ratkowski

📍 Loomis, CA: #5 of 12 inventorsTop 45%
🗺 California: #19,344 of 55,090 inventorsTop 40%
Overall (2025): #401,142 of 469,880Top 90%
1
Patents 2025

Issued Patents 2025

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
D1093538 Pointed recoil spring guide for pistol — 2025-09-16