Osamu Yoshikawa

This inventor holds 18 USPTO granted patents, primarily in Fishing Reel Technology. Top assignees: Shimano Inc., Shimano Industrial Co., Ltd.. Active years: 1985-2000.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Osamu Yoshikawa. Retrieved from https://idiyas.com/inventor/osamu-yoshikawa-gn11icfd

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

USPTO Granted Patents = 18

% Patents Active = 100.0

Average Co-Inventor Count = 1.4

ph-index = 8

Forward Citations = 136(Granted Patents)

Company Filing History:

Shimano Industrial Co., Ltd.

patents

Years Active: 1985-2000

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Areas of Expertise:

Spinning Reel

Balancing Means

Drag Adjusting Device

Sealed Front Drag Mechanism

Shock Absorbing Mechanism

Bail Arm Control

One-Way Clutch

Closed-Face Reel

Brake Device

Sound Producing Apparatus

18 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6027058 - Spinning reel having balancing means (2000-02-22),

2. 5967438 - Spinning reel having balancing means (1999-10-19),

3. 5772138 - Spinning reel having balancing means (1998-06-30),

4. 5540397 - Spinning reel (1996-07-30),

5. 5419505 - Spinning reel having a stopper for limiting spool movement (1995-05-30),

6. 5379957 - Spinning reel having balancer (1995-01-10),

7. 5350129 - Spinning reel having balancing means (1994-09-27),

8. 5342003 - Spinning reel (1994-08-30),

9. 5328127 - Spinning reel having a sealed front drag mechanism (1994-07-12),

10. 5312067 - Spinning reel (1994-05-17),

11. 5308017 - Spinning reel with a shock absorbing mechanism (1994-05-03),

12. 5301898 - Outer spool type spinning reel having improved bail arm control mechanism (1994-04-12),

13. 5279477 - Sound producing apparatus for spinning reel (1994-01-18),

14. 5221057 - Spinning reel with one-way clutch mechanism (1993-06-22),

15. 4778123 - Drag adjusting device for a closed-face type fishing reel (1988-10-18),

Title: Osamu Yoshikawa: Innovator in Spinning Reel Technology

Introduction

Osamu Yoshikawa is a distinguished inventor based in Sakai, Japan, recognized for his significant contributions to the field of fishing reel technology. With a remarkable portfolio of 18 patents, Yoshikawa has dedicated his career to enhancing the functionality and reliability of spinning reels.

Latest Patents

Among his latest innovations is a patent for a spinning reel that incorporates balancing means. This advanced spinning reel features a reel body and a rotor that rotates around a longitudinal axis to facilitate the retrieval of fishing lines. The inclusion of a balancer is a notable enhancement, as it restricts the imbalance during rotation to a level substantially within 200 g-mm, ensuring smoother operation and improved user experience.

Career Highlights

Throughout his career, Yoshikawa has held key positions at respected companies such as Shimano Inc. and Shimano Industrial Co., Ltd. His work has played a crucial role in advancing the technology and design of fishing reels, making them more efficient and user-friendly.

Collaborations

Yoshikawa has collaborated with talented peers in the industry, including noteworthy coworkers like Yoshiyuki Furomoto and Kenichi Sugawara. Their combined efforts have propelled innovations in fishing gear and set new standards for performance and quality.

Conclusion

Osamu Yoshikawa’s dedication to innovation in spinning reel technology ensures his place as a pivotal figure in the fishing industry. His patents not only reflect his creativity and expertise but also contribute significantly to enhancing the fishing experience for enthusiasts worldwide.

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]