DR

David L. Ruff

GR Grefco: 1 patents #1 of 2Top 50%
📍 Torrance, CA: #9 of 61 inventorsTop 15%
🗺 California: #1,105 of 6,198 inventorsTop 20%
Overall (1982): #70,100 of 81,411Top 90%
1
Patents 1982

Issued Patents 1982

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4313997 Perlite boards and method for making same Narikottile G. Nath 1982-02-02