Inventor

OEI HAN-YONG

DE3 patents

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

METALLGESELLSCHAFT AG

2 patents

US4824490AApr 25, 1989

Process of producing phosphate coatings on metals

METALLGESELLSCHAFT AG19 citations75

US5039361AAug 13, 1991

Process of phosphating metal surfaces

METALLGESELLSCHAFT AG6 citations55

OXY METAL INDUSTRIES CORP

1 patent

US4199381AApr 22, 1980

Preparation of metals for cold forming

OXY METAL INDUSTRIES CORP19 citations77