LW

Lothar H. Waldes

CH Christensen: 1 patents #11 of 32Top 35%
Overall (All Time): #4,093,021 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4278138 Composite heavy metal drill collar David S. Rowley, James T. Aumann 1981-07-14