Charles P. Hallez

DB Diamant Boart: 2 patents #1 of 1Top 100%

📍 Tellin, BE: #1 of 1 inventorsTop 100%

Overall (1989): #11,468 of 140,708Top 9%

Patents 1989

Issued Patents 1989

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
4887676	Device for closing a core barrel installed in a drilling rig	—	1989-12-19
4856719	Cutting arm	—	1989-08-15
4832138	Device to control the locking of a boring corer	—	1989-05-23