RR

Roy C. Rowland

📍 Oklahoma City, OK: #8 of 57 inventorsTop 15%
🗺 Oklahoma: #151 of 749 inventorsTop 25%
Overall (1989): #61,344 of 140,708Top 45%
1
Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4881616 Hearing aid retention apparatus Gwen V. Janssen 1989-11-21