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For the Inventor, By the Inventor

Tokyo, Japan

Mitsubishi Pencil Company, Limited


USPTO Granted Patents = 383



Trademarks = 50

Forward Citations = 2,670

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244 inventors (with patents filed for the assignee):

goldMedal Tsuyoshi Nishida (34 out of 41 patents)

silverMedal Yoshihisa Suda (34 out of 41 patents)

bronzeMedal Kazuhiko Takanashi (27 out of 28 patents)

4.  Toshimi Kamitani (24 out of 25 patents)

5.  Kyo Nakayama (18 out of 19 patents)

6.  Takeo Fukumoto (18 out of 18 patents)

7.  Hirotake Izawa (13 out of 13 patents)

8.  Kazuhiko Furukawa (11 out of 41 patents)

9.  Shuji Ichikawa (11 out of 16 patents)

10.  Satoshi Sakuma (10 out of 23 patents)

11.  Kunitaka Yamada (10 out of 12 patents)

12.  Yasunari Kabasawa (10 out of 23 patents)

13.  Takamasa Kawakubo (10 out of 15 patents)

14.  Takeshi Kobayashi (9 out of 36 patents)

15.  Takahiro Osada (9 out of 21 patents)


Core Competencies:
Aqueous Ink Composition
Ballpoint Pen
Mechanical Pencil
Writing Instrument
Cosmetic Applicator
Ink Composition
Liquid Storage Member
Fiber-Bundled Part
Marking Ink Composition
Pen Tip
Composite Colored Particle
Oil-Based Ink Composition

383 patents:

1. 12486414 - Composite colored particle (2025-12-02),
2. 12473445 - Ink composition for aqueous ballpoint pens (2025-11-18),
3. 12466967 - Aqueous ink composition for writing instruments (2025-11-11),
4. 12466210 - Shaft body of pencil or cosmetic (2025-11-11),
5. 12441899 - Ink composition for water-based ballpoint pen (2025-10-14),
6. 12397579 - Writing instrument (2025-08-26),
7. 12369699 - Cosmetic applicator (2025-07-29),
8. 12358685 - Replacement lead case (2025-07-15),
9. 12325255 - Writing instrument (2025-06-10),
10. 12275271 - Ballpoint pen refill and ballpoint pen (2025-04-14),
11. 12275215 - Liquid storage member for coating tools (2025-04-14),
12. D1066495 - Pen (2025-03-11),
13. D1065329 - Pen (2025-03-04),
14. 12227024 - Writing implement (2025-02-18),
15. 12214616 - Mechanical pencil (2025-02-04),
Mitsubishi Pencil Company, Limited is a Japanese company specializing in the manufacturing and selling of writing instruments. Established in 1887, the company has a long history of innovation and premium quality products. Mitsubishi Pencil is renowned for its wide range of writing instruments, including mechanical pencils, ballpoint pens, and art supplies. With a commitment to excellence and customer satisfaction, they continue to develop innovative writing tools that cater to the needs of professionals and enthusiasts worldwide.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Dec 23 2025

383 Patents

#196 in Tokyo

#436 in Japan

#2,338 in the World

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Tokyo, Japan

Mitsubishi Pencil Company, Limited

Forward Citations = 2,670

244 inventors:

goldMedal Tsuyoshi Nishida (34 out of 41 patents)

silverMedal Yoshihisa Suda (34 out of 41 patents)

bronzeMedal Kazuhiko Takanashi (27 out of 28 patents)

4.  Toshimi Kamitani (24 out of 25 patents)

5.  Kyo Nakayama (18 out of 19 patents)

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