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Inventor

Tetsuo Ohkawa

Inventor
Tokyo, JP

Overview

8→
Patents
2003–2014
Patent span
Human necessities
Primary field (CPC A)

Patents· 8 as inventor

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

A01Nprimary
A01NPreservation of bodies of humans or animals or plants or parts thereof75%
B24BMachines, devices, or processes for grinding or polishing25%
PatentTitleYear
8,883,687'Herbicidal composition'20148,318,635'Phytotoxicity controlling agent for upland farming and phytotoxicity controlling method using the same'20128,114,815'Herbicidal composition'20128,067,337'Agricultural chemical composition'20117,829,499'Granular pesticide preparation'20107,638,506'Granular agrochemical composition'20096,648,728'Polishing system'20036,531,399'Polishing method'2003

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2003Patents assigned to HITACHI LTD (2)· patent assignee history
2003Based in Yokohama, JP· patent location history
2009–2014Patents assigned to KUMIAI CHEMICAL INDUSTRY CO (6)· patent assignee history
2009–2014Based in Tokyo, JP· patent location history
2011–2014Patents assigned to IKEUCHI TOSHIHIRO (4)· patent assignee history
2011–2014Patents assigned to OHKAWA TETSUO (4)· patent assignee history
2011–2012Patents assigned to OGAWA YASUNORI (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
KUMIAI CHEMICAL INDUSTRY CO62009–2014
IKEUCHI TOSHIHIRO42011–2014
OHKAWA TETSUOself42011–2014
HITACHI LTD22003
OGAWA YASUNORI22011–2012
Locations
LocationPatentsSpan
Tokyo, JP62009–2014
Yokohama, JP22003