DW

Duane W. Woltjen

MT Marshalltown Trowel: 4 patents #2 of 8Top 25%
SP Sunnen Products: 2 patents #12 of 38Top 35%
📍 Manchester, MO: #55 of 278 inventorsTop 20%
🗺 Missouri: #3,599 of 23,789 inventorsTop 20%
Overall (All Time): #884,520 of 4,157,543Top 25%
6
Patents All Time

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
6105882 Texture material applicator 2000-08-22
6018841 Finishing trowel including handle Curtis D. Kelsay, Kent Douglas Williams 2000-02-01
5713096 Finishing trowel handle Curtis D. Kelsay, Kent Douglas Williams 1998-02-03
5522111 Finishing trowel handle Curtis D. Kelsay, Kent Douglas Williams 1996-06-04
4555875 Means for attaching a replaceable stone and/or guide assembly to a master holder Robert M. Sunnen 1985-12-03
4486983 Guides for honing heads Robert M. Sunnen 1984-12-11