RJ

Ronald L. Sitzema, Jr.

DD Dentsply Research And Development: 1 patents #7 of 18Top 40%
LI Lexalite International: 1 patents #1 of 2Top 50%
📍 Ellsworth, MI: #1 of 1 inventorsTop 100%
🗺 Michigan: #263 of 3,452 inventorsTop 8%
Overall (1989): #16,798 of 140,708Top 15%
2
Patents 1989

Issued Patents 1989

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4867682 Dental impression tray Paul D. Hammesfahr, Steven R. Jefferies 1989-09-19
4839781 Reflector/refractor Josh T. Barnes 1989-06-13