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For the Inventor, By the Inventor

Ehime, Japan

Unicharm Corporation


USPTO Granted Patents = 1,655

% Expired Patents = 39.1



Trademarks = 9

Forward Citations = 34,637

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623 inventors (with patents filed for the assignee):

goldMedal Toshifumi Otsubo (98 out of 112 patents)

silverMedal Satoshi Mizutani (90 out of 90 patents)

bronzeMedal Hiroki Yamamoto (85 out of 89 patents)

4.  Yuki Noda (78 out of 78 patents)

5.  Takayoshi Konishi (70 out of 71 patents)

6.  Yoshitaka Mishima (64 out of 65 patents)

7.  Hirotomo Mukai (60 out of 60 patents)

8.  Yoshinori Tanaka (59 out of 202 patents)

9.  Satoru Sakaguchi (57 out of 57 patents)

10.  Takamitsu Igaue (52 out of 52 patents)

11.  Daisuke Komatsubara (50 out of 50 patents)

12.  Hisashi Takai (44 out of 44 patents)

13.  Takeshi Ikegami (41 out of 64 patents)

14.  Ichiro Wada (39 out of 40 patents)

15.  Tatsuya Tamura (39 out of 55 patents)


Core Competencies:
Pet Diaper
Litter Box
Absorbent Sheet
Pet Toilet
Animal Litter
Disposable Diaper
Urine Absorbing Sheet
Pet Food Packaging
Cleaning Tool
Recycled Pulp
Sanitary Article
Elastic Sheet

1,655 patents:

1. D1145212 - Litter box (2026-08-25),
2. D1145211 - Pet potty tray (2026-08-25),
3. D1143373 - PET POTTY TRAY (2026-08-18),
4. D1140380 - Litter box (2026-08-04),
5. D1133919 - Pet food packaging container (2026-07-14),
6. 12678345 - Absorbent article for pet (2026-07-14),
7. 12616164 - Pet toilet system (2026-05-05),
8. 12599509 - Cat diaper (2026-04-14),
9. 12575545 - Pet diaper and method for manufacturing same (2026-03-17),
10. 12543698 - Litter for system litter box and method for manufacturing same (2026-02-10),
11. 12478033 - System toilet for pets (2025-11-25),
12. D1101314 - Adhesive pad for pet urine absorption sheet (2025-11-04),
13. D1101313 - Adhesive pad for pet urine absorption sheet (2025-11-04),
14. 12433255 - Diaper for pet (2025-10-07),
15. 12414536 - Animal litter box (2025-09-16),
Unicharm Corporation, headquartered in Ehime, Japan, specializes in the development and manufacturing of innovative pet care products. The company focuses on enhancing the quality of life for pets and their owners through a range of offerings, including pet diapers, absorbent sheets, and litter boxes. Unicharm is dedicated to advancing technology in pet hygiene and care, ensuring that its products meet the evolving needs of pet owners while promoting animal welfare and comfort.
Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

Unicharm Corporation
1,655 Patents

#1 in Ehime

#141 in Japan

#607 in the World

Ehime, JP
Ehime, Japan

Unicharm Corporation

Forward Citations = 34,637

623 inventors:

goldMedal Toshifumi Otsubo (98 out of 112 patents)

silverMedal Satoshi Mizutani (90 out of 90 patents)

bronzeMedal Hiroki Yamamoto (85 out of 89 patents)

4.  Yuki Noda (78 out of 78 patents)

5.  Takayoshi Konishi (70 out of 71 patents)

Please report any incorrect information to [email protected]
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