Ontario
Canada
4
2025-03-06
The entities that hold a legal rights for patent applications filed by inventor DRENTH CHRISTOPHER L.:
CHRISTOPHER L. DRENTH from Ontario, CA has applied for patents for these inventions. The list has both pending applications and granted patents:
GREASELESS CORE BARREL HEAD ASSEMBLY
#2 | 2024-11-14DUAL TUBE DRILL STRING COMPONENTS
#3 | 2022-09-15Continuous sampling drill bit
#4 | 2015-10-22Core barrel head assembly with an integrated sample orientation tool and system for using same
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