DM

DuWayne A. Marthaller

UN Unknown: 1 patents #29,356 of 83,584Top 40%
📍 Mandan, ND: #27 of 55 inventorsTop 50%
🗺 North Dakota: #1,185 of 2,395 inventorsTop 50%
Overall (All Time): #3,590,547 of 4,157,543Top 90%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6272775 Rear dumping dragline bucket and rigging system Don F. Schmidt, Karl Lemmerman, Dean Bray, William Lengenfelder, R. Steven Metzger 2001-08-14