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For the Inventor, By the Inventor

Osakashi, Japan

Sakura Color Products Corporation


USPTO Granted Patents = 176


Trademarks = 50

Forward Citations = 1,705

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118 inventors (with patents filed for the assignee):

goldMedal Hiroshi Inoue (25 out of 94 patents)

silverMedal Hidetoshi Fukuo (18 out of 18 patents)

bronzeMedal 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:
Ballpoint Pen
Ink Composition
Plasma Processing
Hydrogen Peroxide Detection
Electret Particles
Liquid Applicator
Writing Instrument
Discolorable Ink
Water-Based Ink
Crayon Production
Oil-Based Ink
Marker Holder

176 patents:

1. D1046967 - Ballpoint pen (2024-10-15),
2. 10401338 - Plasma processing detection indicator (2019-09-03),
3. 10400125 - Ink composition for plasma treatment detection, and plasma treatment detection indicator (2019-09-03),
4. 10195301 - Ink composition for detecting hydrogen peroxide and indicator for detection of hydrogen peroxide (2019-02-05),
5. 10184058 - Ink composition for detecting plasma treatment and indicator for detecting plasma treatment (2019-01-22),
6. 10181414 - Indicator used in electronic device manufacturing apparatus and method for designing and/or managing the apparatus (2019-01-15),
7. 10180413 - Ink composition for plasma processing detection, and indicator for plasma processing detection using said ink composition (2019-01-15),
8. 10180392 - Plasma processing detection indicator using inorganic substance as a color-change layer (2019-01-15),
9. 9683118 - Oil-based pigment ink composition and oil-based pigment ink writing tool (2017-06-20),
10. 9513526 - Fine electret particles and process for producing same (2016-12-06),
11. 9458336 - Ink composition (2016-10-04),
12. D758490 - Ballpoint pen (2016-06-07),
13. 9194808 - Ink composition for detecting hydrogen peroxide and indicator for detection of hydrogen peroxide (2015-11-24),
14. 9079450 - Plastic eraser, plastic eraser composite body, and method for producing thereof (2015-07-14),
15. 9074060 - Processes for manufacturing electret fine particles or coarse powder (2015-07-07),
Sakura Color Products Corporation is a leading manufacturer of art materials and stationery. With a rich history dating back to 1921, Sakura has been providing innovative, high-quality products to artists, craftspeople, and students around the world. Their extensive range of products includes markers, pens, paints, pencils, and much more. Sakura is committed to creating tools that inspire creativity and foster artistic expression. Every product is designed with precision, durability, and functionality in mind, ensuring the best possible experience for artists of all levels. Visit the Sakura Color Products Corporation website to explore their extensive product offerings and discover new ways to unleash your creativity.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 30 2025

176 Patents

#4 in Osakashi

#750 in Japan

#4,600 in the World

...
Osakashi, Japan

Sakura Color Products Corporation

Forward Citations = 1,705

118 inventors:

goldMedal Hiroshi Inoue (25 out of 94 patents)

silverMedal Hidetoshi Fukuo (18 out of 18 patents)

bronzeMedal Yasuyuki Yoshimura (17 out of 17 patents)

4.  Takeshi Omatsu (14 out of 14 patents)

5.  Masahiro Yasunaga (12 out of 14 patents)

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