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For the Inventor, By the Inventor

Osaka, Japan

C. Itoh & Co., Ltd.

Calculating rank
USPTO Granted Patents = 13

Forward Citations = 126

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11 inventors (with patents filed for the assignee):

goldMedal Hiroshi Uchiyama (4 out of 10 patents)

silverMedal Thomas U Coe (4 out of 6 patents)

bronzeMedal Atsushi Yamazaki (3 out of 3 patents)

4.  Chris Krishnan (2 out of 2 patents)

5.  Toshinori Morizane (1 out of 8 patents)

6.  Yuko Yoshida (1 out of 1 patent)

7.  Koichi Awazu (1 out of 1 patent)

8.  Teruhiro Takama (1 out of 1 patent)

9.  Susumu Higuchi (1 out of 1 patent)

10.  Akijiro Shibayama (1 out of 1 patent)

11.  Daiji Nagatomo (1 out of 2 patents)


13 patents:

1. 5131977 - Base plate for recording disc and a method for its manufacture (1992-07-21),
2. 4870524 - Substrate for rigid disk storage media (1989-09-26),
3. 4829799 - Method of manufacturing substrate for memory disk (1989-05-16),
4. 4825680 - Method of manufacturing metal substrates for disk for memory storage (1989-05-02),
5. 4823578 - Method of manufacturing substrate for memory disk (1989-04-25),
6. D296211 - Printer for a computer (1988-06-14),
7. D295977 - Printer for a computer (1988-05-31),
8. 4648136 - Human body protector (1987-03-10),
9. 4483956 - Acrylic resin article (1984-11-20),
10. 4388119 - Dibenzylidene sorbitol composition and process for preparation thereof (1983-06-14),
11. 4267110 - Process for preparing dibenzylidenesorbitol and composition containing (1981-05-12),
12. 4173896 - Device for measuring rotational speed of a diesel engine (1979-11-13),
13. 4131612 - Process for purifying crude dibenzylidene sorbitol (1978-12-26),
Company Overview
C. Itoh & Co., Ltd. is a diversified trading company based in Osaka, Japan, specializing in a wide range of sectors including textiles, chemicals, and machinery. The company engages in the import and export of various goods, leveraging its extensive network to facilitate international trade. C. Itoh also invests in technology and innovation, focusing on sustainable practices and advanced manufacturing processes to enhance its product offerings and meet global market demands.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

13 Patents

#409 in Osaka

#3,754 in Japan

#45,104 in the World

Osaka, JP
Osaka, Japan

C. Itoh & Co., Ltd.

Forward Citations = 126

11 inventors:

goldMedal Hiroshi Uchiyama (4 out of 10 patents)

silverMedal Thomas U Coe (4 out of 6 patents)

bronzeMedal Atsushi Yamazaki (3 out of 3 patents)

4.  Chris Krishnan (2 out of 2 patents)

5.  Toshinori Morizane (1 out of 8 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: C. Itoh & Co., Ltd.. Retrieved from https://idiyas.com/company/c-itoh-and-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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