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Citizen Watch Company, Ltd.

USPTO Granted Patents = 2,002

CIPO Patents = 1

EPO Patents = 199

Trademarks = 5

Forward Citations = 23,544

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1,274 inventors (with patents filed for the assignee):

Shigeru Morokawa (59 out of 63 patents)

Fukuo Sekiya (52 out of 53 patents)

Heihachiro Ebihara (41 out of 41 patents)

4. Kanetaka Sekiguchi (40 out of 46 patents)

5. Takashi Toida (34 out of 35 patents)

6. Takashi Akiyama (32 out of 68 patents)

7. Tomomi Murakami (29 out of 36 patents)

8. Yasushi Nomura (29 out of 29 patents)

9. Masafumi Ide (27 out of 51 patents)

10. Yukio Miya (27 out of 32 patents)

11. Yasushi Kaneko (26 out of 27 patents)

12. Fumio Nakajima (25 out of 26 patents)

13. Minoru Watanabe (23 out of 199 patents)

14. Shinya Kondoh (23 out of 26 patents)

15. Makoto Yasunaga (23 out of 26 patents)

Core Competencies:

Timepiece Technology

Emotion Assessment

Light-Emitting Devices

Magnetic Field Sensors

Machine Tool Control

Watchcase Design

Coolant Supply Systems

Reciprocating Display Mechanisms

Electronic Timepieces

Tooling Exchange Mechanisms

Pressure Detection Devices

Titanium Manufacturing

2,002 patents: Sort by Forward Citations

1. 12443143 - Train wheel holding structure and timepiece (2025-10-14),

2. 12429827 - Mechanical timepiece (2025-09-30),

3. 12427613 - Tooling exchange mechanism and machine tool having the tooling exchange mechanism (2025-09-30),

4. 12426816 - Emotion assessment apparatus, emotion assessment method and emotion assessment program (2025-09-30),

5. 12396300 - Light-emitting device and method of manufacturing the same (2025-08-19),

6. 12370822 - Printer and bookbinding assisting tool (2025-07-29),

7. 12362337 - Light emitting device (2025-07-15),

8. 12360180 - Magnetic field sensor head and method for manufacturing same (2025-07-15),

9. D1081397 - Watchcase (2025-07-01),

10. D1080616 - Case for watch (2025-06-24),

11. 12337402 - Machining device, machining method and cutting tool (2025-06-24),

12. D1076702 - Watch dial (2025-05-27),

13. 12311485 - Coolant supply device and machine tool (2025-05-27),

14. 12296394 - Chuck device (2025-05-13),

15. 12271175 - Tool information setting device and machine tool (2025-04-08),

Citizen Watch Company, Ltd. is a global leader in timekeeping, renowned for its precision and innovation since its establishment in 1930. With a commitment to excellence and craftsmanship, Citizen produces a wide range of watches that embody superior quality and technological advancements. As a pioneer in eco-friendly timekeeping, the company introduced the world's first light-powered analog quartz watch in 1976. Today, Citizen continues to push boundaries with its groundbreaking technologies and designs, offering customers reliable and stylish timepieces.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 23 2025

2,002 Patents

#57 in Tokyo

#119 in Japan

#487 in the World

Citizen Watch Company, Ltd.

Forward Citations = 23,544

1,274 inventors:

Shigeru Morokawa (59 out of 63 patents)

Fukuo Sekiya (52 out of 53 patents)

Heihachiro Ebihara (41 out of 41 patents)

4. Kanetaka Sekiguchi (40 out of 46 patents)

5. Takashi Toida (34 out of 35 patents)

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