DK

David A. Kirk

DI Dresser Industries: 2 patents #157 of 787Top 20%
📍 Pittsburgh, PA: #3,179 of 7,570 inventorsTop 45%
🗺 Pennsylvania: #30,495 of 74,527 inventorsTop 45%
Overall (All Time): #2,322,689 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4957887 Magnesite-carbon refractories David J. Michael, Leigh F. Brooks 1990-09-18
4912068 Magnesite-carbon refractories David J. Michael, Leigh F. Brooks 1990-03-27