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For the Inventor, By the Inventor

Ibaraki, Japan

Takeharu Kitagawa

This inventor holds 56 USPTO granted patents and 5 published patent applications and 20 EPO patents, primarily in Optical Film Technology (CPC class B32B). Top assignee: Nitto-Denko Corporation. Active years: 2009-2021.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Takeharu Kitagawa. Retrieved from https://idiyas.com/inventor/takeharu-kitagawa

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

USPTO Granted Patents = 56 

% Patents Active = 48.2

 

Average Co-Inventor Count = 4.4

ph-index = 13

Forward Citations = 533(Granted Patents)

Forward Citations (Not Self Cited) = 466(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Osaka, JP (2009 - 2018)
  • Onomichi, JP (2016 - 2018)
  • Ibaraki, JP (2011 - 2021)

Company Filing History:

goldMedal56 out of 3,949 
 
Nitto-Denko Corporation
 patents

Years Active: 2009-2021

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Areas of Expertise:
Optical Film
Polarizing Plate
Liquid Crystal Display
Adhesive Layer
Film Laminate
Manufacturing Method
Optical Laminate
Pressure-Sensitive Adhesive
Polarizer
Image Display
Thin Film
Production Method
56 patents (USPTO):Explore Patents
1. 10983391 - Polarizing plate with retardation layer and image display device (2021-04-20),
2. 10551540 - Separator-attached adhesive layer structure and production method therefor, separator-attached adhesive layer and polarizing film combination structure and production method therefor, and image display device (2020-02-04),
3. 10437095 - Continuous optical film laminate, roll of continuous optical film laminate and IPS liquid crystal display device (2019-10-08),
4. 10421264 - Method of producing roll of laminate strip with polarizing film (2019-09-24),
5. 10274659 - Polarizing plate comprising an optical functional film and a protective film having a specified moisture permeability (2019-04-30),
6. 10266629 - Pressure-sensitive adhesive composition for optical film, pressure-sensitive adhesive layer for optical film, pressure-sensitive adhesive optical film, and image display device (2019-04-23),
7. 10228496 - Pressure-sensitive adhesive layer-attached polarizing film and image display (2019-03-12),
8. 10160173 - Method of producing thin polarizing film involving in-air stretching, underwater stretching, and stretching while drying (2018-12-25),
9. 10156671 - Polarizing plate with phase-difference layer and image display device (2018-12-18),
10. 10107946 - Polarizing plate with a retardation layer and image display apparatus (2018-10-23),
11. 9927656 - Liquid crystal panel and polarizing laminate for use in the liquid crystal panel (2018-03-27),
12. 9921342 - Polarizing plate and optical laminate (2018-03-20),
13. 9864101 - Polarizing film obtained by acetoacetyl-modified PVA-based resin having specified modification rate (2018-01-09),
14. 9744750 - Method and apparatus for continuously producing optical panel assemblies (2017-08-29),
15. 9645292 - Thin high-performance polarizing film and method for manufacturing the same (2017-05-09),

Title: The Innovative Mind of Takeharu Kitagawa

Introduction: Takeharu Kitagawa, a talented inventor hailing from Ibaraki, Japan, is known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Takeharu Kitagawa has recently been granted several patents for his cutting-edge inventions in the realm of robotics and artificial intelligence, solidifying his position as a pioneer in the industry.

Career Highlights: With a career spanning over two decades, Takeharu Kitagawa has worked tirelessly to push the boundaries of what is possible in the world of technology. His innovative solutions have revolutionized various sectors, from healthcare to manufacturing.

Collaborations: Throughout his career, Takeharu Kitagawa has collaborated with leading research institutions, universities, and tech companies to bring his ideas to life. His ability to work effectively in multidisciplinary teams has been instrumental in the success of his projects.

Conclusion: Takeharu Kitagawa's passion for innovation and his relentless drive to create have cemented his legacy as a visionary inventor. His contributions to the field continue to inspire future generations of inventors and shape the technological landscape for years 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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