DD

Donald H. Duncan

JH J.M. Huber: 2 patents #60 of 207Top 30%
📍 Spruce Pine, NC: #10 of 29 inventorsTop 35%
🗺 North Carolina: #14,587 of 45,564 inventorsTop 35%
Overall (All Time): #1,640,459 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5797547 Methods and apparatus for delaminating sedimentary mica — 1998-08-25
5137217 Mica deliminator — 1992-08-11
5037034 Mica delaminator — 1991-08-06