'This St. Paul co. began by mining corundum, then making sandpaper & masking tape'
3M
MINNESOTA: This St. Paul co. began by mining corundum, then making sandpaper & masking tape
This St. Paul co. began by mining corundum, then making sandpaper & masking tape
This St. Paul co. began by mining corundum, then making sandpaper & masking tape
MINNESOTA
3M
MINNESOTA