Inventor

CHAN KWONG O

CA2 patents

⚠️ This page may combine multiple inventors who share the name “CHAN KWONG O”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

VETCO GRAY INC

1 patent

US7647989B2Jan 19, 2010

Backup safety flow control system for concentric drill string

VETCO GRAY INC5 citations67

CHAN KWONG O

1 patent

US8141641B2Mar 27, 2012

Backup safety flow control system for concentric drill string

CHAN KWONG O3 citations50