RC

Robert V. Colangelo

AC American Colloid: 2 patents #15 of 49Top 35%
Overall (All Time): #2,323,302 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4936386 Method for sealing well casings in the earth — 1990-06-26
4919989 Article for sealing well castings in the earth — 1990-04-24