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For the Inventor, By the Inventor

Tokyo, Japan

Sankyo Manufacturing Co., Ltd.

Calculating rank
USPTO Granted Patents = 61

% Expired Patents = 13.1


Trademarks = 6

Forward Citations = 340

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8 inventors (with patents filed for the assignee):

goldMedal Heizaburo Kato (50 out of 91 patents)

silverMedal Heizaburou Kato (8 out of 9 patents)

bronzeMedal Heizaburou Katoh (2 out of 2 patents)

4.  Masao Nishioka (1 out of 3 patents)

5.  Osamu Kojima (1 out of 2 patents)

6.  Yukihisa Maruyama (1 out of 1 patent)

7.  Masao Anma (1 out of 1 patent)

8.  Grant E Hagan (1 out of 1 patent)


Core Competencies:
Cam Mechanisms
Automatic Tool Changer
Article Conveyor
Transporting Apparatus
Rotating Table
Tool Magazine
Pressure Loss Compensation
Non-Contact Inspection
Indexing Device
Material Feeding
Rolling Contact Device
Stroke Control

61 patents:

1. 7066318 - Transporting apparatus (2006-06-27),
2. 7024740 - Rotating table apparatus (2006-04-11),
3. 6865968 - Cam apparatus and pick and place apparatus utilizing the same (2005-03-15),
4. 6862786 - Rotating table apparatus (2005-03-08),
5. 6773382 - Automatic tool-exchanging apparatus (2004-08-10),
6. 6716146 - Tool Magazine (2004-04-06),
7. 6708815 - Article conveyor device (2004-03-23),
8. 6679131 - Cam apparatus and pick and place apparatus utilizing the same (2004-01-20),
9. 6637290 - Housing oscillating type cam apparatus, and work shifter using such apparatus (2003-10-28),
10. 6601470 - Cam mechanism (2003-08-05),
11. 6598733 - Article conveyor device (2003-07-29),
12. 6547441 - Cam mechanism (2003-04-15),
13. 6454684 - Automatic tool changing apparatus (2002-09-24),
14. 6206784 - Torque limiter (2001-03-27),
15. 6186014 - Cam mechanism (2001-02-13),
Company Overview
Sankyo Manufacturing Co., Ltd. is a Tokyo-based company specializing in the development and production of advanced cam mechanisms and related automation technologies. Their expertise encompasses a range of core technologies, including automatic tool changers, article conveyors, and transporting apparatuses, which are integral to enhancing operational efficiency in various industrial applications. The company is committed to innovation in non-contact inspection methods and pressure loss compensation, positioning itself as a leader in precision engineering solutions.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

61 Patents

#712 in Tokyo

#1,510 in Japan

#11,921 in the World

Tokyo, JP
Tokyo, Japan

Sankyo Manufacturing Co., Ltd.

Forward Citations = 340

8 inventors:

goldMedal Heizaburo Kato (50 out of 91 patents)

silverMedal Heizaburou Kato (8 out of 9 patents)

bronzeMedal Heizaburou Katoh (2 out of 2 patents)

4.  Masao Nishioka (1 out of 3 patents)

5.  Osamu Kojima (1 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Sankyo Manufacturing Co., Ltd.. Retrieved from https://idiyas.com/company/sankyo-manufacturing-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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