L. Mark Knolle

TI Terra Sonic International: 2 patents #3 of 4Top 75%

📍 Marietta, OH: #60 of 150 inventorsTop 40%

🗺 Ohio: #30,338 of 73,341 inventorsTop 45%

Overall (All Time): #1,812,431 of 4,157,543Top 45%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
11821312	Drilling rig and methods using multiple types of drilling for installing geothermal systems	—	2023-11-21
11692398	Sonic-powered methods for horizontal directional drilling	—	2023-07-04