Inventor

KATAYAMA NOBUO

JP2 patents

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

RIKON KK

1 patent

US7243596B2Jul 17, 2007

Spacer expander

RIKON KK15 citations75

RIKEN KK

1 patent

US6834861B2Dec 28, 2004

Two piece oil control ring with nitrided surface layers

RIKEN KK10 citations62