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Inventor

Hisanaga Yokoyama

Inventor
Kanagawa, JP

Overview

3→
Patents
2014–2017
Patent span
Mechanical engineering
Primary field (CPC F)

Patents· 3 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

F01Lprimary
F01LCyclically operating valves for machines or engines21%
B21KMaking forged or pressed metal products, e.g. horse-shoes, rivets, bolts or wheels14%
C22CAlloys14%
F16KValves14%
B23PMetal-working not otherwise provided for7%
C21DModifying the physical structure of ferrous metals7%
C23CCoating metallic material7%
Y02PClimate change mitigation technologies in the production or processing of goods7%
Y10TTechnical subjects covered by former us classification7%
PatentTitleYear
9,840,948'Method for supplying inert gas into poppet valve intermediate and apparatus for supplying inert gas into poppet valve intermediate'20179,334,977'Engine valve'20168,689,761'Exhaust poppet valve and solution heat treatment method of the same'2014

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2014–2017Patents assigned to NITTAN VALVA (3)· patent assignee history
2014Patents assigned to TANAKA YASUHITO (1)· patent assignee history
2014Patents assigned to YOKOYAMA HISANAGA (1)· patent assignee history
2014–2017Based in Kanagawa, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
NITTAN VALVA32014–2017
TANAKA YASUHITO12014
YOKOYAMA HISANAGAself12014
Locations
LocationPatentsSpan
Kanagawa, JP32014–2017