Kazumasa Hara

This inventor holds 32 USPTO granted patents, primarily in Sewing Machine Technology. Top assignees: Janome Sewing Machine Company Limited, Janome Sewing Machine Industry Co., Ltd.. Active years: 1981-1998.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kazumasa Hara. Retrieved from https://idiyas.com/inventor/kazumasa-hara

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 32

% Patents Active = 100.0

Average Co-Inventor Count = 3.4

ph-index = 7

Forward Citations = 170(Granted Patents)

Location History:

Tama, JP (1981 - 1982)
Hino, JP (1984 - 1990)
Tokyo, JP (1984 - 1991)
Hachioji, JP (1998)

Company Filing History:

29 out of 609

Janome Sewing Machine Company Limited

patents

3 out of 45

Janome Sewing Machine Industry Co., Ltd.

patents

Years Active: 1981-1998

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Areas of Expertise:

Sewing Machine

Thread Tension Control

Embroidery Stitching

Zigzag Sewing

Automatic Device

Lower Thread Adjustment

Thread Guiding

Lock Stitching

Upper Thread Device

Thread Cutting

Feed Dog Structure

Tension Regulating

32 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5775240 - Sewing machine capable of embroidery stitching, and embroidery data (1998-07-07),

2. 5022335 - Upper thread supplying device in sewing machine (1991-06-11),

3. 5003896 - Device for guiding a lower thread in a sewing machine (1991-04-02),

4. 4998491 - Method of automatically controlling upper thread tension in a sewing (1991-03-12),

5. 4967679 - Automatic thread tension control sewing machine (1990-11-06),

6. 4960062 - Sewing machine automatic thread tension device with thread elongation (1990-10-02),

7. 4949657 - Sewing machine with a device for amending thread tightening by needle (1990-08-21),

8. 4926770 - Needle hole guide mechanism for zigzag sewing machine (1990-05-22),

9. 4920903 - Device for adjusting a lower thread in a sewing machine (1990-05-01),

10. 4892048 - Automatic thread tightening device for a sewing machine (1990-01-09),

11. 4793273 - Automatic thread tension device for a sewing machine (1988-12-27),

12. 4724784 - Device for changing a lower thread running path for a zigzag sewing (1988-02-16),

13. 4704975 - Upper and lower thread tension devices for sewing machine (1987-11-10),

14. 4702185 - Sewing machine with an automatic thread tension device (1987-10-27),

15. 4700644 - Sewing machine having an automatic lower thread tension device (1987-10-20),

Title: Innovator Spotlight: Kazumasa Hara - Pioneering Innovations in Sewing Machine Technology

Introduction: Kazumasa Hara is a distinguished inventor based in Tokyo, Japan, with a remarkable track record of 32 patents in his name. His groundbreaking work in the field of sewing machine technology has revolutionized the industry.

Latest Patents: Among his latest patents, Kazumasa Hara introduced the concept of a sewing machine capable of embroidery stitching and an embroidery data producing device. This innovative technology allows for the creation of intricate and customizable embroidery patterns with great precision and ease. Additionally, he developed an upper thread supplying device for sewing machines, optimizing the thread supply process for enhanced efficiency and accuracy.

Career Highlights: Kazumasa Hara has made significant contributions to the sewing machine industry through his work with companies like Janome Sewing Machine Company Limited and Janome Sewing Machine Industry Co., Ltd. His expertise and creativity have led to the development of cutting-edge sewing machine technologies that have set new standards in the field.

Collaborations: Throughout his career, Kazumasa Hara has collaborated with esteemed professionals in the industry, including Mikio Koike and Susumu Hanyu. Together, they have worked on various projects that have pushed the boundaries of innovation in sewing machine design and functionality.

Conclusion: Kazumasa Hara's passion for innovation and his dedication to pushing the boundaries of sewing machine technology have established him as a pioneer in the field. His numerous patents and collaborations reflect his commitment to excellence and his relentless pursuit of advancing the industry. Kazumasa Hara's impact on the world of sewing machines is undeniable, and his work continues to inspire future generations of inventors and innovators.

Profile summary based on public USPTO records.

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]