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For the Inventor, By the Inventor

Yokohama, Japan

Otax Company Limited


USPTO Granted Patents = 9

% Expired Patents = 44.4

Forward Citations = 117

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15 inventors (with patents filed for the assignee):

goldMedal Kazuo Aoki (4 out of 10 patents)

silverMedal Toshiyuki Yoshida (3 out of 13 patents)

bronzeMedal Naoki Hiyama (3 out of 12 patents)

4.  Tadahiro Ohkura (3 out of 3 patents)

5.  Mitsuru Kainuma (3 out of 3 patents)

6.  Hiroshi Narita (2 out of 2 patents)

7.  Hiroshi Iwamiya (1 out of 10 patents)

8.  Young-ho Choi (1 out of 20 patents)

9.  Kazuto Ushiyama (1 out of 3 patents)

10.  Hiroaki Aoto (1 out of 1 patent)

11.  Katsumi Yamaguchi (1 out of 21 patents)

12.  Mituru Kainuma (1 out of 1 patent)

13.  Hidenori Muramatsu (1 out of 10 patents)

14.  Sentaro Motohashi (1 out of 1 patent)

15.  Hiroshi Abe (1 out of 46 patents)


9 patents:

1. 7545638 - Card slot and electronic device provided with card slot (2009-06-09),
2. 7518870 - Card slot apparatus having a movable heat radiating unit and electronic machine having the same (2009-04-14),
3. 7314450 - Wearable heartbeat measuring device, system and method (2008-01-01),
4. 7083442 - PC card connector assembly (2006-08-01),
5. 7083424 - Socket for electronic part (2006-08-01),
6. 6004141 - Socket for electronic part (1999-12-21),
7. 5835017 - Radio searching system (1998-11-10),
8. 5532581 - Connector for measuring apparatus (1996-07-02),
9. 5528519 - Connector for measuring apparatus (1996-06-18),
Company Overview
Otax Company Limited is a leading provider of tax preparation and financial consulting services. With a team of experienced professionals, we help individuals and businesses navigate the complexities of tax laws and regulations to maximize their savings and minimize their liabilities. Our commitment to excellence and customer satisfaction sets us apart in the industry.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

9 Patents

#87 in Yokohama

#4,704 in Japan

Yokohama, JP
Yokohama, Japan

Otax Company Limited

Forward Citations = 117

15 inventors:

goldMedal Kazuo Aoki (4 out of 10 patents)

silverMedal Toshiyuki Yoshida (3 out of 13 patents)

bronzeMedal Naoki Hiyama (3 out of 12 patents)

4.  Tadahiro Ohkura (3 out of 3 patents)

5.  Mitsuru Kainuma (3 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Otax Company Limited. Retrieved from https://idiyas.com/company/otax-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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