Copyer Kabushiki Kaisha

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USPTO Granted Patents = 6

Forward Citations = 93

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9 inventors (with patents filed for the assignee):

Shozo Ishikawa (6 out of 38 patents)

Kazuharu Katagiri (3 out of 126 patents)

Yoshio Takasu (3 out of 47 patents)

4. Makoto Kitahara (3 out of 42 patents)

5. Katsunori Watanabe (3 out of 15 patents)

6. Kiyoshi Sakai (2 out of 77 patents)

7. Masaaki Hiro (1 out of 19 patents)

8. Minoru Mabuchi (1 out of 11 patents)

9. Hideyuki Takahashi (1 out of 9 patents)

6 patents: Sort by Forward Citations

1. 4554231 - Electrophotographic photosensitive member (1985-11-19),

2. 4551404 - Disazo electrophotographic photosensitive member (1985-11-05),

3. 4500619 - Electrophotographic photosensitive member with oxadiazole containing (1985-02-19),

4. 4471040 - Electrophotographic disazo photosensitive member (1984-09-11),

5. 4454211 - Electrophotographic photosensitive member with pyrazoline charge (1984-06-12),

6. 4446217 - Electrophotographic photosensitive member having a hydrazone containing (1984-05-01),

Company Overview

Copyer Kabushiki Kaisha is a leading provider of printing and copying services in Japan. With a focus on quality and efficiency, Copyer offers a wide range of solutions for businesses of all sizes. Whether you need flyers, brochures, business cards, or large format printing, Copyer has the technology and expertise to meet your needs. Contact us today to learn more about how Copyer can help your business succeed.

Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

6 Patents

#2,469 in Tokyo

#5,990 in Japan

Tokyo, Japan