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For the Inventor, By the Inventor

Tokyo, Japan

Rocoh Company, Ltd.

Calculating rank
USPTO Granted Patents = 6

Forward Citations = 29

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20 inventors (with patents filed for the assignee):

goldMedal Jack L Minney (3 out of 15 patents)

silverMedal James A Komarek (3 out of 22 patents)

bronzeMedal Scott B Tanner (3 out of 13 patents)

4.  Clarence W Padgett (3 out of 25 patents)

5.  Keiji Fukumura (3 out of 4 patents)

6.  Motohiro Oishi (3 out of 4 patents)

7.  Shin-ichi Kojima (3 out of 4 patents)

8.  H Nakanishi (3 out of 4 patents)

9.  Hiroyuki Kishida (1 out of 40 patents)

10.  Toyoaki Tano (1 out of 29 patents)

11.  Mariko Takii (1 out of 21 patents)

12.  Koichi Sakata (1 out of 56 patents)

13.  Hitoshi Iwatsuki (1 out of 54 patents)

14.  Hiroshi Tohmatsu (1 out of 23 patents)

15.  Toyoshi Sawada (1 out of 57 patents)


6 patents:

1. 8512928 - Carrier for developing electrostatic latent image, and two-component developer, supplemental developer, image forming apparatus, process cartridge, and image forming method using the carrier (2013-08-20),
2. 5870346 - VLSI memory circuit (1999-02-09),
3. 5608687 - Output driver control for ROM and RAM devices (1997-03-04),
4. 5487038 - Method for read cycle interrupts in a dynamic read-only memory (1996-01-23),
5. 5077579 - Copies with automatic document feeder (1991-12-31),
6. 4369471 - Apparatus for and method of processing the image signal (1983-01-18),
Company Overview
Ricoh Company, Ltd. is a Japanese multinational imaging and electronics company founded in 1936. They provide digital imaging solutions, IT services, production printing, and industrial systems. Ricoh is known for its innovative products and commitment to sustainability.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Nov 3 2026

6 Patents

#2,470 in Tokyo

#5,993 in Japan

Tokyo, JP
Tokyo, Japan

Rocoh Company, Ltd.

Forward Citations = 29

20 inventors:

goldMedal Jack L Minney (3 out of 15 patents)

silverMedal James A Komarek (3 out of 22 patents)

bronzeMedal Scott B Tanner (3 out of 13 patents)

4.  Clarence W Padgett (3 out of 25 patents)

5.  Keiji Fukumura (3 out of 4 patents)

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