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For the Inventor, By the Inventor

Osaka, Japan

Masaki Hasegawa

This inventor holds 40 USPTO granted patents and 14 published patent applications and 10 EPO patents, primarily in Nonaqueous Electrolyte Batteries. Top assignees: Matsushita Electric Industrial Co., Ltd., Panasonic Corporation, Panasonic Intellectual Property Management Co., Ltd.. Active years: 1993-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masaki Hasegawa. Retrieved from https://idiyas.com/inventor/masaki-hasegawa

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

USPTO Granted Patents = 40 

% Patents Active = 77.5

 

Average Co-Inventor Count = 3.7

ph-index = 9

Forward Citations = 297(Granted Patents)


Location History:

  • Kadoma, JP (1993)
  • Hirakata, JP (1993 - 2009)
  • Osaka, JP (1996 - 2021)

Company Filing History:

goldMedal16 out of 27,375 
 
Matsushita Electric Industrial Co., Ltd.
 patents
silverMedal15 out of 16,454 
 
Panasonic Corporation
 patents
bronzeMedal7 out of 13,338 
 
Panasonic Intellectual Property Management Co., Ltd.
 patents
4. 1 out of 592 
 
Panasonic Intellectual Property Managment Co., Ltd.
 patents
5. 1 out of 8,782 
 
Sanyo Electric Co., Ltd.
 patents

Years Active: 1993-2026

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Areas of Expertise:
Nonaqueous Electrolyte
Lithium-Ion Battery
Negative Electrode
Electrode Material
Energy Storage
Manufacturing Method
Secondary Battery
Composite Particle
Electrical Storage Device
Positive Electrode
Electrolytic Solution
40 patents (USPTO):Explore Patents
1. 12683169 - Negative electrode for secondary batteries, and secondary battery (2026-07-14),
2. 12300819 - Negative electrode for secondary battery, and non-aqueous electrolyte secondary battery (2025-05-13),
3. 12148917 - Nonaqueous electrolyte secondary battery negative electrode and nonaqueous electrolyte secondary battery (2024-11-19),
4. 10991981 - Nonaqueous electrolyte secondary battery (2021-04-27),
5. 10103382 - Nonaqueous electrolyte secondary battery (2018-10-16),
6. 9799925 - Nonaqueous electrolyte secondary battery (2017-10-24),
7. 9287562 - Negative electrode active material comprising spinel lithium titanate, electrical storage device, and method for producing negative electrode active material (2016-03-15),
8. 9065148 - Negative electrode active material for lithium ion secondary battery and method for producing the same (2015-06-23),
9. 8962187 - Negative electrode active material for lithium ion secondary battery and method for producing the same (2015-02-24),
10. 8920976 - Nonaqueous electrolyte secondary battery (2014-12-30),
11. 8563157 - Nonaqueous electrolyte secondary battery and method for manufacturing the same (2013-10-22),
12. 8399129 - Negative electrode for lithium secondary battery, and lithium secondary battery including the same (2013-03-19),
13. 8389156 - Negative electrode for non-aqueous electrolyte secondary battery, method for producing the same, and non-aqueous electrolyte secondary battery (2013-03-05),
14. 8318359 - Electrode for lithium secondary battery, lithium secondary battery and method for producing the same (2012-11-27),
15. 8303672 - Electrode for lithium secondary battery, lithium secondary battery and method for producing the same (2012-11-06),

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Title: The Innovative Work of Masaki Hasegawa: A Pioneer in Battery Technology

Introduction: Masaki Hasegawa, a prolific inventor based in Osaka, Japan, has made significant contributions to the field of nonaqueous electrolyte secondary batteries, with an impressive portfolio of 37 patents.

Latest Patents:

1. "Nonaqueous electrolyte secondary battery - This nonaqueous electrolyte secondary battery is provided with a positive electrode, a negative electrode, and a non-aqueous electrolyte."

2. "Nonaqueous electrolyte secondary battery - A nonaqueous electrolyte secondary battery includes a positive electrode capable of absorbing and releasing lithium and a negative electrode with specific characteristics for optimized performance."

Career Highlights: Hasegawa has showcased his expertise while working at Matsushita Electric Industrial Co., Ltd. and Panasonic Corporation, where he honed his skills and expertise in battery technology.

Collaborations: Throughout his career, Hasegawa has collaborated closely with accomplished professionals in the field, including Yasuhiko Bito and Shuji Ito, further enriching his innovative pursuits in battery technology.

Conclusion: Masaki Hasegawa's pioneering work in the development of nonaqueous electrolyte secondary batteries stands as a testament to his innovative spirit and dedication to advancing energy storage technologies. His numerous patents and collaborations underscore his profound impact on the industry, solidifying his legacy as a trailblazer in the field of battery innovation.

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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]
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