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Citizen Machinery Co., Ltd.

USPTO Granted Patents = 83

EPO Patents = 63

Forward Citations = 71

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81 inventors (with patents filed for the assignee):

Kazuhiko Sannomiya (18 out of 18 patents)

Takaichi Nakaya (16 out of 22 patents)

Hitoshi Matsumoto (15 out of 109 patents)

4. Kyota Kotake (7 out of 7 patents)

5. Hiroshi Kasuya (7 out of 8 patents)

6. Hiroshi Shinohara (6 out of 21 patents)

7. Takanori Shinohara (6 out of 7 patents)

8. Hikaru Takahashi (6 out of 6 patents)

9. Atsushi Aoyagi (5 out of 8 patents)

10. Hajime Matsumaru (5 out of 8 patents)

11. Masakazu Sagasaki (4 out of 27 patents)

12. Mitsuo Watanabe (4 out of 84 patents)

13. Noriyuki Asahara (4 out of 5 patents)

14. Nobuyoshi Imasaki (4 out of 4 patents)

15. Yutaka Shibui (4 out of 9 patents)

Core Competencies:

Tooling Exchange Mechanism

Machining Device

Coolant Supply Device

Chuck Device

Tool Information Setting Device

Vibration Cutting Insert

Friction Welding Method

Abnormality Detection Device

Numerical Control Device

Turret Tool Holder

Rod Member Feeding Device

Machine Tool Control Device

83 patents: Sort by Forward Citations

1. 12427613 - Tooling exchange mechanism and machine tool having the tooling exchange mechanism (2025-09-30),

2. 12337402 - Machining device, machining method and cutting tool (2025-06-24),

3. 12311485 - Coolant supply device and machine tool (2025-05-27),

4. 12296394 - Chuck device (2025-05-13),

5. 12271175 - Tool information setting device and machine tool (2025-04-08),

6. 12251763 - Machine tool and machining method (2025-03-18),

7. 12214434 - Machine tool and control device for machine tool (2025-02-04),

8. 12162078 - Machine tool (2024-12-10),

9. 12090596 - Control device for machine tool and machine tool (2024-09-17),

10. 12048959 - Rod member feeding device, machine tool including the rod member feeding device and control method for the rod member feeding device (2024-07-30),

11. 11975414 - Tool rest and machine tool (2024-05-07),

12. 11919093 - Machine tool (2024-03-05),

13. 11554420 - Threading device and threading method (2023-01-17),

14. 11517991 - Machine tool including vibration restriction means (2022-12-06),

15. 11517990 - Machine tool (2022-12-06),

Citizen Machinery Co., Ltd. is a leading global manufacturer of CNC (Computer Numerical Control) automatic lathes and machining centers. With over 90 years of experience, Citizen Machinery has been providing innovative solutions for precision machining and automation. Their state-of-the-art products are widely used in various industries including automotive, electronics, medical, and aerospace. In addition to their high-quality machines, Citizen Machinery offers comprehensive after-sales service and technical support to ensure customer satisfaction.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

83 Patents

#14 in Nagano

#1,243 in Japan

#8,901 in the World

Citizen Machinery Co., Ltd.

Forward Citations = 71

81 inventors:

Kazuhiko Sannomiya (18 out of 18 patents)

Takaichi Nakaya (16 out of 22 patents)

Hitoshi Matsumoto (15 out of 109 patents)

4. Kyota Kotake (7 out of 7 patents)

5. Hiroshi Kasuya (7 out of 8 patents)

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