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The Sailor Pen Co., Ltd.

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USPTO Granted Patents = 18

Trademarks = 1

Forward Citations = 141

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29 inventors (with patents filed for the assignee):

Hideshi Okamoto (3 out of 4 patents)

Kiyoto Shigematsu (2 out of 2 patents)

Isao Shimada (2 out of 2 patents)

4. Isao Inagaki (2 out of 2 patents)

5. Hirofumi Hamamoto (2 out of 2 patents)

6. Yasuhiro Masumoto (2 out of 2 patents)

7. Kazuhiko Osaki (2 out of 2 patents)

8. Kazushige Matsumuro (2 out of 2 patents)

9. Fumio Kobayashi (1 out of 2 patents)

10. Yoshiyuki Sunaga (1 out of 3 patents)

11. Koji Matsuo (1 out of 16 patents)

12. Ichiro Morimoto (1 out of 2 patents)

13. Eiji Hishinuma (1 out of 1 patent)

14. Toshiaki Tanaka (1 out of 13 patents)

15. Koichi Murakawa (1 out of 1 patent)

18 patents: Sort by Forward Citations

1. 12285967 - Writing instrument and pen tip part (2025-04-29),

2. 6499363 - Tip for pipette and pipette with the same (2002-12-31),

3. 6056463 - Aqueous ballpoint pen refill and process for producing the same (2000-05-02),

4. 6021680 - Pipette (2000-02-08),

5. 5542771 - Applicator having cap which pressurizes and seals inner space (1996-08-06),

6. 5462379 - Applicator having cap which pressurizes and seals inner space (1995-10-31),

7. 5421664 - Fluid applicator with fluid tank pressurization device (1995-06-06),

8. 5362169 - Applicator having cap which pressurizes inner space (1994-11-08),

9. 5277510 - Applicator with spring biased ball (1994-01-11),

10. 4976560 - Mechanical pencil with a plastic chuck (1990-12-11),

11. D281512 - Nib for a fountain pen (1985-11-26),

12. 4547947 - Method for producing a nondirectional pen (1985-10-22),

13. 4547946 - Method for producing a nondirectional pen (1985-10-22),

14. D272364 - Combined decoration stamp and cap (1984-01-24),

15. D272363 - Combined decoration stamp and cap (1984-01-24),

Company Overview

The Sailor Pen Co., Ltd., based in Tokyo, specializes in the design and manufacture of high-quality writing instruments, particularly fountain pens. Renowned for their craftsmanship, Sailor combines traditional techniques with innovative designs to create products that appeal to both collectors and everyday users. The company emphasizes precision engineering and the use of premium materials, contributing to its reputation in the global stationery market. Sailor's commitment to excellence reflects a deep appreciation for the art of writing.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

18 Patents

#1,414 in Tokyo

#3,125 in Japan

#34,263 in the World

The Sailor Pen Co., Ltd.

Forward Citations = 141

29 inventors:

Hideshi Okamoto (3 out of 4 patents)

Kiyoto Shigematsu (2 out of 2 patents)

Isao Shimada (2 out of 2 patents)

4. Isao Inagaki (2 out of 2 patents)

5. Hirofumi Hamamoto (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: The Sailor Pen Co., Ltd.. Retrieved from https://idiyas.com/company/sailor-pen-company

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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