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Copal Company Limited

USPTO Granted Patents = 192

Trademarks = 2

Forward Citations = 1,514

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166 inventors (with patents filed for the assignee):

Nobuyoshi Inoue (23 out of 38 patents)

Yasuo Ishiguro (15 out of 16 patents)

Toshihisa Saito (14 out of 14 patents)

4. Katsuhiko Okabe (13 out of 13 patents)

5. Yukio Yoshikawa (10 out of 19 patents)

6. Shigekazu Nakamura (10 out of 10 patents)

7. Masaaki Takagi (9 out of 46 patents)

8. Tomio Kurosu (9 out of 19 patents)

9. Kenji Wakazono (9 out of 9 patents)

10. Munetaka Shimizu (9 out of 9 patents)

11. Kiyoyuki Arai (8 out of 8 patents)

12. Kunio Matsumoto (7 out of 10 patents)

13. Akira Suzuki (6 out of 153 patents)

14. Kunio Arisaka (4 out of 5 patents)

15. Noribumi Tachihara (4 out of 6 patents)

Core Competencies:

Light-Shielding Blade

Magneto-Optical Disk

Optical Scanner

Focal Plane Shutter

Camera Shutter Device

Fluid Bearing

Capacitive Acceleration Sensor

Optical Displacement Detector

Stepper Motor

Printing Apparatus

Film Feeder

Torque Sensor

192 patents: Sort by Forward Citations

1. 6502296 - Method of fabricating a light-shielding blade composed of beryllium-aluminum alloy (2003-01-07),

2. 6317287 - Motor with output shaft having lead screw portion and pre-load generating mechanism (2001-11-13),

3. 6131840 - Mechanism for preventing uneven take-up of tape (2000-10-17),

4. 6001465 - Light shielding blade for camera made of para-orientation aromatic (1999-12-14),

5. 5943119 - Photographic developing/printing apparatus (1999-08-24),

6. 5917796 - Magneto-optical disk apparatus having an ejector arm and magnetic field (1999-06-29),

7. 5848844 - Fluid bearing (1998-12-15),

8. 5809676 - Sign display apparatus (1998-09-22),

9. 5775791 - Surface emission apparatus (1998-07-07),

10. 5771217 - Magneto-optical disk apparatus having a ejector arm and magnetic field (1998-06-23),

11. D388123 - Light-emitting diode indicator (1997-12-23),

12. 5699058 - Absolute encoder generating phase-shifted triangular waveforms to (1997-12-16),

13. 5669030 - Film feeder for automatic developing machine (1997-09-16),

14. 5600392 - Position sensor (1997-02-04),

15. 5539519 - Compact, high resolution optical displacement detector (1996-07-23),

Copal Company Limited is a global provider of financial research outsourcing services. With a focus on financial analytics and business consulting, Copal specializes in delivering high-quality research and insights to financial institutions, corporations, and asset managers worldwide. With its team of experienced professionals and advanced technology platforms, Copal offers customized solutions to help clients address their unique research requirements and make informed investment decisions.

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

Company Badge

USPTO Data Jan 1 1976 - Dec 23 2025

192 Patents

#322 in Tokyo

#707 in Japan

#4,255 in the World

Copal Company Limited

Forward Citations = 1,514

166 inventors:

Nobuyoshi Inoue (23 out of 38 patents)

Yasuo Ishiguro (15 out of 16 patents)

Toshihisa Saito (14 out of 14 patents)

4. Katsuhiko Okabe (13 out of 13 patents)

5. Yukio Yoshikawa (10 out of 19 patents)

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