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Okuma Machinery Works Ltd.

USPTO Granted Patents = 28

Trademarks = 2

Forward Citations = 249

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42 inventors (with patents filed for the assignee):

Toshihiro Kimura (3 out of 3 patents)

Yasukazu Hayashi (2 out of 29 patents)

Hiroshi Narushima (2 out of 3 patents)

4. Takayoshi Kojima (2 out of 2 patents)

5. Katsuyoshi Kitagawa (2 out of 4 patents)

6. Nokihisa Adachi (2 out of 2 patents)

7. Yasumasa Narikiyo (2 out of 2 patents)

8. Mitsuhiro Kawabe (2 out of 2 patents)

9. Ryuji Toida (2 out of 2 patents)

10. Toshiaki Watanabe (2 out of 2 patents)

11. Masayuki Nashiki (1 out of 52 patents)

12. Yuji Sakai (1 out of 3 patents)

13. Takashi Nishimoto (1 out of 3 patents)

14. Fumitoshi Terasaki (1 out of 4 patents)

15. Yukio Taki (1 out of 1 patent)

Core Competencies:

Abnormal State Detection

Index Control

Screw Cutting

Feedback Controller

Tool Management

Position Control

Interference Prevention

Automatic Tool Changing

Numerically Controlled Lathe

Cam Machining

Knitting Error Detection

Feed Rate Control

28 patents: Sort by Forward Citations

1. 5142210 - Abnormal state detecting apparatus of a machine tool (1992-08-25),

2. 5121039 - Index control apparatus for tool rest of NC lathe (1992-06-09),

3. 5105135 - Feedback controller for NC controlled machine tools (1992-04-14),

4. 5104268 - Screw cutting machine (1992-04-14),

5. 5088244 - Machining method for member included screw-shaped portion (1992-02-18),

6. 5076744 - Screw cutting machine (1991-12-31),

7. 5025914 - Feed-screw support structure (1991-06-25),

8. 4901541 - Needle selector for knitting machine (1990-02-20),

9. 4534803 - Method of cleaning machined surface and chip removing tool (1985-08-13),

10. 4505020 - Tool replacing device (1985-03-19),

11. D265319 - Combined lathe and swarf cover therefor (1982-07-06),

12. 4296657 - Method and apparatus for positioning work on a numerically controlled (1981-10-27),

13. 4255682 - Multipolar resolver (1981-03-10),

14. 4214191 - System for automatic management of tool life (1980-07-22),

15. 4197490 - Numerical control system for a machine tool having a plurality of saddles (1980-04-08),

Company Overview

Okuma Machinery Works Ltd. is a prominent Japanese manufacturer specializing in precision machine tools and CNC (computer numerical control) systems. The company is renowned for its innovative solutions in the fields of machining and manufacturing, catering to various industries including automotive, aerospace, and general engineering. With a strong emphasis on research and development, Okuma focuses on enhancing productivity and efficiency through advanced technology, positioning itself as a leader in the global machine tool market.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

28 Patents

#41 in Nagoya

#2,417 in Japan

#23,299 in the World

Okuma Machinery Works Ltd.

Forward Citations = 249

42 inventors:

Toshihiro Kimura (3 out of 3 patents)

Yasukazu Hayashi (2 out of 29 patents)

Hiroshi Narushima (2 out of 3 patents)

4. Takayoshi Kojima (2 out of 2 patents)

5. Katsuyoshi Kitagawa (2 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Okuma Machinery Works Ltd.. Retrieved from https://idiyas.com/company/okuma-machinery-works

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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