Inventor

MARHOFER WILLIAM E

CA3 patents

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

O J PIPELINES CANADA

2 patents

US6657161B2Dec 2, 2003

External pipe welding apparatus

O J PIPELINES CANADA20 citations87

US6953909B2Oct 11, 2005

External pipe welding apparatus

O J PIPELINES CANADA14 citations79

O J PIPELINES CORP

1 patent

US5932123AAug 3, 1999

Mobile automated pipeline welding and quality control system

O J PIPELINES CORP157 citations93