% Expired Patents = 40.0

CIPO Patents = 1

Forward Citations = 42

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11 inventors (with patents filed for the assignee):

Takuya Shimokawa (2 out of 5 patents)

Kaoru Shimomura (2 out of 2 patents)

Takashi Imai (2 out of 7 patents)

4. Minoru Takahashi (1 out of 23 patents)

5. Kazuaki Sakakura (1 out of 7 patents)

6. Toshiro Ozaki (1 out of 1 patent)

7. Takumi Fujisaki (1 out of 1 patent)

8. Tadao Adachi (1 out of 1 patent)

9. Masanori Kikuchi (1 out of 1 patent)

10. Kazutosi Nagahori (1 out of 1 patent)

11. Shigeharu Tanaka (1 out of 1 patent)

12. Minoru Takahashi (11 patents)

5 patents: Sort by Forward Citations

1. 10682798 - Molding apparatus (2020-06-16),

2. 10464250 - Molding apparatus (2019-11-05),

3. 4767303 - Extruding apparatus for extruding synthetic resin (1988-08-30),

4. 4738612 - Pivotable blow-molding apparatus for molding hollow articles of (1988-04-19),

5. 4473527 - Method and apparatus for forming inflation film (1984-09-25),

Company Overview

Placo Co, Ltd. is a leading manufacturer of high-quality plasterboard and drywall solutions. With a strong focus on innovation and sustainability, Placo has been providing construction materials for residential and commercial projects for over 50 years. Our products are known for their durability, versatility, and ease of installation. We are committed to delivering exceptional customer service and continue to expand our product range to meet the evolving needs of the construction industry.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

5 Patents

#110 in Saitama 343-0827

#6,651 in Japan

Saitama, Japan

Placo Co, Ltd.

Forward Citations = 42

11 inventors:

Takuya Shimokawa (2 out of 5 patents)

Kaoru Shimomura (2 out of 2 patents)

Takashi Imai (2 out of 7 patents)

4. Minoru Takahashi (1 out of 23 patents)

5. Kazuaki Sakakura (1 out of 7 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Placo Co, Ltd.. Retrieved from https://idiyas.com/company/placo-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]

1 patent (CIPO):

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]