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For the Inventor, By the Inventor

Tokyo, Japan

Bunka Shutter Co., Ltd.

USPTO Granted Patents = 11

% Expired Patents = 9.1


Forward Citations = 85

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21 inventors (with patents filed for the assignee):

goldMedal Shigeo Yamagami (3 out of 3 patents)

silverMedal Masanori Kobayashi (3 out of 23 patents)

bronzeMedal Katsuhiko Murakami (2 out of 30 patents)

4.  Kohichi Kondoh (2 out of 2 patents)

5.  Kenji Yoshida (1 out of 86 patents)

6.  Kazunori Matsuo (1 out of 20 patents)

7.  Shoji Takahashi (1 out of 29 patents)

8.  Masanari Tetsuya (1 out of 1 patent)

9.  Tetsuya Imabayashi (1 out of 1 patent)

10.  Takayuki Maeda (1 out of 2 patents)

11.  Yasunobu Oshima (1 out of 2 patents)

12.  Yasunobu Ohshima (1 out of 2 patents)

13.  Tohru Uetake (1 out of 1 patent)

14.  Takato Kumagai (1 out of 1 patent)

15.  Noriaki Iwase (1 out of 1 patent)


11 patents:

1. 12276155 - Connecting fitting construction materials and connecting method therefor (2025-04-14),
2. 11746586 - Connecting device for construction materials, connecting structure therefor, and connecting method therefor (2023-09-05),
3. 11746585 - Connection member for construction materials, connecting fitting therefor, connecting structure therefor, and connecting method therefor (2023-09-05),
4. 9810011 - Opening/closing device (2017-11-07),
5. 9670697 - Door device with pressure difference mitigating mechanism (2017-06-06),
6. 6630235 - Bullet-proof glass screen, and bullet-proof glass screen device (2003-10-07),
7. 6065546 - Fire extinguishing and smoke eliminating apparatus and method using (2000-05-23),
8. 5072766 - Panel shutter assembly (1991-12-17),
9. 5065806 - Panel shutter assembly (1991-11-19),
10. 4838331 - Slat opening/closing drive mechanism in shutter equipment (1989-06-13),
11. 4595043 - Shutter device (1986-06-17),
Company Overview
Bunka Shutter Co., Ltd. is a prominent manufacturer based in Tokyo, specializing in the development and production of high-quality shutter systems and related products. The company focuses on innovative solutions for security and aesthetics in both residential and commercial applications. With a commitment to advanced engineering and design, Bunka Shutter integrates technology into its offerings, ensuring durability and functionality. The firm serves a diverse market, contributing to safety and convenience in urban environments across Japan and beyond.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

11 Patents

#1,808 in Tokyo

#4,139 in Japan

#51,801 in the World

Tokyo, JP
Tokyo, Japan

Bunka Shutter Co., Ltd.

Forward Citations = 85

21 inventors:

goldMedal Shigeo Yamagami (3 out of 3 patents)

silverMedal Masanori Kobayashi (3 out of 23 patents)

bronzeMedal Katsuhiko Murakami (2 out of 30 patents)

4.  Kohichi Kondoh (2 out of 2 patents)

5.  Kenji Yoshida (1 out of 86 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Bunka Shutter Co., Ltd.. Retrieved from https://idiyas.com/company/bunka-shutter-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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