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Hitachi Tool Engineering, Ltd.

USPTO Granted Patents = 26

% Expired Patents = 19.2

EPO Patents = 17

Trademarks = 1

Forward Citations = 272

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37 inventors (with patents filed for the assignee):

Kazuyuki Kubota (6 out of 10 patents)

Yoshimitsu Nagashima (4 out of 6 patents)

Katsutoshi Maeda (4 out of 5 patents)

4. Takeshi Ishikawa (3 out of 4 patents)

5. Yuuzoh Fukunaga (2 out of 6 patents)

6. Gang Han (2 out of 2 patents)

7. Yuichi Nakahara (2 out of 4 patents)

8. Takahito Kuroda (2 out of 2 patents)

9. Ryosuke Okanishi (2 out of 2 patents)

10. Nobuhiko Shima (2 out of 4 patents)

11. Yusuke Iyori (2 out of 2 patents)

12. Katsuhiko Kojo (2 out of 8 patents)

13. Kenichi Inoue (1 out of 47 patents)

14. Yoshiyuki Kobayashi (1 out of 19 patents)

15. Yasuhiro Kiuchi (1 out of 10 patents)

Core Competencies:

Ball-End Mill

Cutting Tool

Hard Coating

Cemented Carbide

Indexable Insert

Rotary Tool

Micro Deep Hole Drill

Cermet Alloy

Machining Head

Exchangeable Tip

Surface Modification

High-Hardness Materials

26 patents: Sort by Forward Citations

1. 9868162 - Machining head, holder and exchangeable tip cutting tool (2018-01-16),

2. 9868161 - Ball-end mill and insert (2018-01-16),

3. 9534292 - Hard-coated tool and its production method (2017-01-03),

4. 9527141 - Negative cutting insert, and indexable rotary cutting tool, indexable rotary cutting tool system and cutting method using such cutting insert (2016-12-27),

5. 9492872 - Surface-modified, WC-based cemented carbide member, hard-coated, WC-based cemented carbide member, and their production methods (2016-11-15),

6. 9421624 - End mill for cutting of high-hardness materials (2016-08-23),

7. 9228258 - Hard-coated member and its production method, and indexable rotary tool comprising it (2016-01-05),

8. 8827600 - Carbide end mill and cutting method using the end mill (2014-09-09),

9. 8585329 - Ball end mill (2013-11-19),

10. 8304098 - Hard-coated member, and its production method (2012-11-06),

11. 7909549 - Small-diameter deep hole drill and a micro deep hole drilling method (2011-03-22),

12. 7661912 - Tool having damper (2010-02-16),

13. 7537822 - Hard-coated member (2009-05-26),

14. 7435487 - Hard film and hard film-coated tool (2008-10-14),

15. 7368182 - Hard coating and its formation method, and hard-coated tool (2008-05-06),

Company Overview

Hitachi Tool Engineering, Ltd. is a prominent player in the manufacturing and development of cutting tools and precision machinery. Based in Tokyo, Japan, the company specializes in advanced tooling solutions that cater to various industries, including automotive, aerospace, and electronics. With a strong emphasis on innovation and quality, Hitachi Tool Engineering focuses on enhancing productivity and efficiency through its state-of-the-art technologies and materials, positioning itself as a leader in the global tooling market.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

26 Patents

#1,164 in Tokyo

#2,507 in Japan

#24,806 in the World

Hitachi Tool Engineering, Ltd.

Forward Citations = 272

37 inventors:

Kazuyuki Kubota (6 out of 10 patents)

Yoshimitsu Nagashima (4 out of 6 patents)

Katsutoshi Maeda (4 out of 5 patents)

4. Takeshi Ishikawa (3 out of 4 patents)

5. Yuuzoh Fukunaga (2 out of 6 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hitachi Tool Engineering, Ltd.. Retrieved from https://idiyas.com/company/hitachi-tool-engineering

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

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