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Sumitomo Forestry Co., Ltd.

USPTO Granted Patents = 24

Trademarks = 2

Forward Citations = 104

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37 inventors (with patents filed for the assignee):

Junichi Imai (12 out of 15 patents)

Hiroki Nakashima (8 out of 10 patents)

Kunio Kanai (5 out of 8 patents)

4. Hiroki Ishiyama (4 out of 24 patents)

5. Masayoshi Nakamura (4 out of 9 patents)

6. Yoshinobu Kumakawa (3 out of 3 patents)

7. Ryo Soda (3 out of 3 patents)

8. Takayuki Masuko (3 out of 12 patents)

9. Kentaro Nakamura (2 out of 2 patents)

10. Kazuyuki Matsumura (1 out of 38 patents)

11. Tomotake Morita (1 out of 8 patents)

12. Hiroshi Takashima (1 out of 3 patents)

13. Taisuke Nagashima (1 out of 1 patent)

14. Hiroki Kagei (1 out of 1 patent)

15. Kenji Umemura (1 out of 1 patent)

24 patents: Sort by Forward Citations

1. 12173347 - Technique for controlling molecular weight of PHA copolymer produced by halobacterium (2024-12-24),

2. D852029 - Connecting metal member for a column end (2019-06-25),

3. D850894 - Connecting metal member for a column end (2019-06-11),

4. 9828773 - Column end joint structure (2017-11-28),

5. 9739299 - Coupling member, method for producing coupling member, and wooden member joint structure (2017-08-22),

6. 9249817 - Wooden member joint structure (2016-02-02),

7. 9238909 - Column base joint structure (2016-01-19),

8. 8950126 - Wooden building skeleton (2015-02-10),

9. 8907012 - Production method for particle board and fiber board (2014-12-09),

10. 8857119 - Wooden member assembly (2014-10-14),

11. D708935 - Beam joint hardware (2014-07-15),

12. D700506 - Beam joint hardware (2014-03-04),

13. D698638 - Nut (2014-02-04),

14. 8511033 - Beam-column connection structure of continued beam connection portion (2013-08-20),

15. D678757 - Screw bolt (2013-03-26),

Sumitomo Forestry Co., Ltd. is a Japanese company engaged in the timber and wood products business. Established in 1691, it is one of the oldest and largest forestry companies in Japan. Sumitomo Forestry operates in various segments, including timber and building materials, housing, overseas business, and real estate. The company focuses on sustainable forestry practices and aims to contribute to society by providing high-quality products and services that promote a comfortable and environmentally friendly living environment.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Jan 6 2026

24 Patents

#1,066 in Tokyo

#2,581 in Japan

#25,875 in the World

Sumitomo Forestry Co., Ltd.

Forward Citations = 104

37 inventors:

Junichi Imai (12 out of 15 patents)

Hiroki Nakashima (8 out of 10 patents)

Kunio Kanai (5 out of 8 patents)

4. Hiroki Ishiyama (4 out of 24 patents)

5. Masayoshi Nakamura (4 out of 9 patents)

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