CG

Charles Michael Gryba

📍 Timmins, CA: #2 of 44 inventorsTop 5%
Overall (All Time): #1,523,467 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
9151047 Undercut excavation method with continuous concrete floors — 2015-10-06
5944453 Undercut excavation with protection against seismic events or excessive ground movement — 1999-08-31
5522676 Undercut excavation method — 1996-06-04