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Nippon Donaldson Ltd.

USPTO Granted Patents = 2

Forward Citations = 65

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8 inventors (with patents filed for the assignee):

Izuru Morita (1 out of 10 patents)

Kazutomo Isono (1 out of 2 patents)

Yoshiaki Kashiwase (1 out of 1 patent)

4. Shigehisa Yamaguchi (1 out of 1 patent)

5. Hiroshi Kagoyama (1 out of 1 patent)

6. Masayoshi Kajitani (1 out of 2 patents)

7. Masanobu Takano (1 out of 1 patent)

8. Masao Kodama (1 out of 1 patent)

2 patents: Sort by Forward Citations

1. 5279090 - Ceiling-frame construction method and ceiling-frame structure for clean (1994-01-18),

2. 4866932 - Apparatus for treating particulate emission from diesel engine (1989-09-19),

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USPTO Data Jan 1 1976 - Dec 16 2025

2 Patents

#4,071 in Tokyo

#10,990 in Japan

Nippon Donaldson Ltd.

Forward Citations = 65

8 inventors:

Izuru Morita (1 out of 10 patents)

Kazutomo Isono (1 out of 2 patents)

Yoshiaki Kashiwase (1 out of 1 patent)

4. Shigehisa Yamaguchi (1 out of 1 patent)

5. Hiroshi Kagoyama (1 out of 1 patent)

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