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Sakura Color Products Corporation

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USPTO Granted Patents = 177

% Expired Patents = 26.6

EPO Patents = 16

Trademarks = 44

Forward Citations = 1,743

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120 inventors (with patents filed for the assignee):

Hiroshi Inoue (25 out of 103 patents)

Hidetoshi Fukuo (18 out of 18 patents)

Yasuyuki Yoshimura (17 out of 17 patents)

4. Takeshi Omatsu (14 out of 14 patents)

5. Masahiro Yasunaga (12 out of 14 patents)

6. Yasunori Nakatani (11 out of 12 patents)

7. Naoshi Murata (10 out of 10 patents)

8. Shigeyasu Inoue (9 out of 12 patents)

9. Norimasa Kurihara (8 out of 8 patents)

10. Hiroyoshi Yamamoto (8 out of 9 patents)

11. Yasuji Okuda (8 out of 8 patents)

12. Yuki Yamamoto (7 out of 18 patents)

13. Tomohiro Sawa (7 out of 8 patents)

14. Shinji Tsujio (7 out of 7 patents)

15. Mikihiko Nakanishi (7 out of 7 patents)

Core Competencies:

Ink Composition

Ballpoint Pen

Plasma Treatment

Electret Particles

Writing Instrument

Crayon

Liquid Applicator

Gas Indicator

Water-Based Ink

Oily Ink

Erasable Ink

Marker Holder

177 patents: Sort by Forward Citations

1. 12594782 - Retractable writing utensil (2026-04-07),

2. D1046967 - Ballpoint pen (2024-10-15),

3. 10401338 - Plasma processing detection indicator (2019-09-03),

4. 10400125 - Ink composition for plasma treatment detection, and plasma treatment detection indicator (2019-09-03),

5. 10195301 - Ink composition for detecting hydrogen peroxide and indicator for detection of hydrogen peroxide (2019-02-05),

6. 10184058 - Ink composition for detecting plasma treatment and indicator for detecting plasma treatment (2019-01-22),

7. 10181414 - Indicator used in electronic device manufacturing apparatus and method for designing and/or managing the apparatus (2019-01-15),

8. 10180413 - Ink composition for plasma processing detection, and indicator for plasma processing detection using said ink composition (2019-01-15),

9. 10180392 - Plasma processing detection indicator using inorganic substance as a color-change layer (2019-01-15),

10. 9683118 - Oil-based pigment ink composition and oil-based pigment ink writing tool (2017-06-20),

11. 9513526 - Fine electret particles and process for producing same (2016-12-06),

12. 9458336 - Ink composition (2016-10-04),

13. D758490 - Ballpoint pen (2016-06-07),

14. 9194808 - Ink composition for detecting hydrogen peroxide and indicator for detection of hydrogen peroxide (2015-11-24),

15. 9079450 - Plastic eraser, plastic eraser composite body, and method for producing thereof (2015-07-14),

Company Overview

Sakura Color Products Corporation, headquartered in Osaka, Japan, specializes in the development and manufacturing of high-quality ink compositions for various writing instruments. The company is renowned for its innovative products, including ballpoint pens, crayons, and liquid applicators, which cater to both artistic and practical applications. With a focus on advanced technologies such as plasma treatment and electret particles, Sakura continues to enhance the performance and functionality of its writing tools, making them a preferred choice for consumers and professionals alike.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

177 Patents

#82 in Osaka

#767 in Japan

#4,712 in the World

Sakura Color Products Corporation

Forward Citations = 1,743

120 inventors:

Hiroshi Inoue (25 out of 103 patents)

Hidetoshi Fukuo (18 out of 18 patents)

Yasuyuki Yoshimura (17 out of 17 patents)

4. Takeshi Omatsu (14 out of 14 patents)

5. Masahiro Yasunaga (12 out of 14 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sakura Color Products Corporation. Retrieved from https://idiyas.com/company/sakura-color-products

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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