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For the Inventor, By the Inventor

Hitachinaka, Japan

Masato Sakai

This inventor holds 57 USPTO granted patents and 2 published patent applications and 2 EPO patents, primarily in Power Tools (CPC class 0805). Top assignee: Hitachi Koki Co., Ltd.. Active years: 1999-2018.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masato Sakai. Retrieved from https://idiyas.com/inventor/masato-sakai

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

USPTO Granted Patents = 57 

% Patents Active = 94.7


Average Co-Inventor Count = 3.4

ph-index = 20

Forward Citations = 1,329(Granted Patents)

Forward Citations (Not Self Cited) = 1,277(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Ibaraki, JP (1999 - 2016)
  • Hitachinaka, JP (1999 - 2017)
  • Ibaraki-ken, JP (2018)

Company Filing History:

goldMedal57 out of 1,267 
 
Hitachi Koki Co., Ltd.
 patents

Years Active: 1999-2018

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Areas of Expertise:
Power Tools
Nailers
Electric Drivers
Battery Packs
Portable Tools
Floodlights
Air Compressors
Circular Saws
Hammer Drills
Pneumatic Nailers
Electric Jigsaws
Percussion Tools
57 patents (USPTO):Explore Patents
1. 9967920 - Electric device outputting light, wind, heat or sound (2018-05-08),
2. D801145 - Nailer (2017-10-31),
3. D800526 - Nailer (2017-10-24),
4. D792708 - Storage case for portable tool (2017-07-25),
5. 9693470 - Electric device with surrounding protective frame (2017-06-27),
6. 9505120 - Power tool (2016-11-29),
7. D744139 - Floodlight (2015-11-24),
8. D735006 - Portable electric driver (2015-07-28),
9. D726142 - Radio receiver (2015-04-07),
10. 8087556 - Power tool (2012-01-03),
11. 7681661 - Electric power tool (2010-03-23),
12. 7665541 - Electric power tool with cover (2010-02-23),
13. D591916 - Engine blower (2009-05-05),
14. D589056 - Engine (2009-03-24),
15. 7490746 - Power tool (2009-02-17),

Title: Masato Sakai: A Pioneer in Innovation

Introduction: Masato Sakai, a visionary inventor hailing from Hitachinaka, JP, has made significant contributions to the world of innovation. With 57 patents to his name and a relentless pursuit of excellence, Sakai continues to inspire future generations of inventors.

Latest Patents: One of his latest patents includes an electric device outputting light, wind, heat, or sound. This invention features an electrical apparatus with a main body portion, a battery pack, and a frame portion. The innovative design allows for conversion of electric power to various forms and easy detachment for power supply.

Career Highlights: Sakai is a key figure at Hitachi Koki Co., Ltd., where he has showcased his expertise in inventing groundbreaking technologies. His commitment to creating a better future through technology has led to numerous successful patent applications and advancements in the field.

Collaborations: Throughout his career, Sakai has collaborated with talented individuals such as Masanori Okada and Takeshi Taniguchi. Together, they have worked on innovative projects that have pushed the boundaries of technological advancements.

Conclusion: Masato Sakai's pioneering spirit and dedication to innovation make him a true trailblazer in the field. His work not only influences the present but also paves the way for a brighter and more technologically advanced future. Sakai's impact on the world of inventions and patents is truly remarkable, and his legacy will continue to inspire generations to come.

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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