Inventor

YOKOYAMA HISANAGA

JP3 patents

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

NITTAN VALVA

2 patents

US9840948B2Dec 12, 2017

Method for supplying inert gas into poppet valve intermediate and apparatus for supplying inert gas into poppet valve intermediate

NITTAN VALVA3 citations68

US9334977B2May 10, 2016

Engine valve

NITTAN VALVA0 citations43

TANAKA YASUHITO

1 patent

US8689761B2Apr 8, 2014

Exhaust poppet valve and solution heat treatment method of the same

TANAKA YASUHITO2 citations55