Nippon Roki Co., Ltd.

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USPTO Granted Patents = 5

Forward Citations = 51

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3 inventors (with patents filed for the assignee):

Kazushige Tanabe (3 out of 3 patents)

Mikio Itoh (2 out of 3 patents)

Katsutoshi Bonkohara (1 out of 1 patent)

5 patents: Sort by Forward Citations

1. 5230760 - Method for manufacturing micro membrane pleats type filter cartridge (1993-07-27),

2. 5215661 - Multi-layer filter cartridge (1993-06-01),

3. 5092351 - Multi-layer filter cartridge (1992-03-03),

4. 5026478 - Metal holder and protector for a disposable plastic capsule (1991-06-25),

5. 4882051 - Cartridge filter incorporating a bag-like body (1989-11-21),

Company Overview

Nippon Roki Co., Ltd. is a Japanese company specializing in the manufacturing of automotive filters. Founded in 1950, the company has a strong reputation for producing high-quality filters that are used by various automotive manufacturers around the world. Nippon Roki is committed to innovation, sustainability, and customer satisfaction.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

5 Patents

#2,722 in Tokyo

#6,656 in Japan

Tokyo, Japan