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For the Inventor, By the Inventor

Kodaira, Japan

Kazuhiko Hiraoka

This inventor holds 39 USPTO granted patents and 1 EPO patent, primarily in Construction Machinery. Top assignees: Hitachi Construction Machinery Co., Ltd., Hitachi, Ltd., Kcm Corporation. Active years: 1986-2019.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kazuhiko Hiraoka. Retrieved from https://idiyas.com/inventor/kazuhiko-hiraoka

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

Calculating rank
USPTO Granted Patents = 39

% Patents Active = 100.0


Average Co-Inventor Count = 5.5

ph-index = 21

Forward Citations = 995(Granted Patents)


Location History:

  • Kodaira, JP (1997 - 2013)
  • Tokyo, JP (1986 - 2019)

Company Filing History:

goldMedal32 out of 1,508 
 
Hitachi Construction Machinery Co., Ltd.
 patents
silverMedal3 out of 42,743 
 
Hitachi, Ltd.
 patents
bronzeMedal3 out of 35 
 
Kcm Corporation
 patents
4. 2 out of 27 
 
Tcm Corporation
 patents
5. 1 out of 999 
 
Brother Industries, Ltd.
 patents
6. 1 out of 129 
 
Ricoh Printing Systems, Ltd.
 patents
7. 1 out of 1 
 
Tcm Co., Ltd.
 patent
where one patent can have more than one assignee

Years Active: 1986-2019

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Areas of Expertise:
Hydraulic Excavator
Construction Machine
Wheel Loader
Forklift
Engine Cover
Counterweight
Cab Design
Armrest
Excavator
Weight
Cover
Railway Vehicle
39 patents (USPTO):Explore Patents
1. D854055 - Armrest for a working vehicle (2019-07-16),
2. D798340 - Hydraulic excavator (2017-09-26),
3. 9309644 - Construction machine (2016-04-12),
4. D752651 - Excavator (2016-03-29),
5. D752113 - Excavator (2016-03-22),
6. D752112 - Excavator (2016-03-22),
7. D703908 - Forklift (2014-04-29),
8. D693857 - Cover for construction machine (2013-11-19),
9. D693853 - Wheel loader (2013-11-19),
10. D692029 - Hydraulic excavator (2013-10-22),
11. D692028 - Hydraulic excavator (2013-10-22),
12. D689530 - Portion of cab for construction machine (2013-09-10),
13. D685009 - Portion of a hydraulic excavator (2013-06-25),
14. D685008 - Portion of a hydraulic excavator (2013-06-25),
15. D684604 - Weight for a construction machine (2013-06-18),

Title: Innovator Spotlight: Kazuhiko Hiraoka

Introduction

Kazuhiko Hiraoka, based in Kodaira, Japan, is a prolific inventor recognized for his significant contributions to engineering and design. With a remarkable portfolio of 39 patents, Hiraoka has made a notable impact in the field of machinery, particularly in working vehicle technology.

Latest Patents

Among his most recent achievements are patents for an armrest designed for a working vehicle and innovations applied to hydraulic excavators. These inventions demonstrate his commitment to enhancing the functionality and user comfort of heavy machinery.

Career Highlights

Kazuhiko Hiraoka has had a fruitful career, notably working with prestigious companies such as Hitachi Construction Machinery Co., Ltd. and KCM Corporation. His time at these organizations has allowed him to develop advanced solutions for modern engineering challenges.

Collaborations

Throughout his career, Hiraoka has collaborated with talented colleagues such as Shigehisa Hagura and Tomoyuki Miyata. These partnerships have been instrumental in driving innovation and advancing technology in their respective fields.

Conclusion

Kazuhiko Hiraoka's contributions to the engineering sector, marked by his impressive patent portfolio and collaborative spirit, underscore his status as a leading innovator. His work continues to inspire advancements in machinery design and functionality.

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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