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For the Inventor, By the Inventor

Tsukuba, Japan

Shunji Takekawa

This inventor holds 15 USPTO granted patents. Top assignees: National Institute for Materials Science, National Institute for Research in Inorganic Materials, Pioneer Corporation. Active years: 2002-2012.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Shunji Takekawa. Retrieved from https://idiyas.com/inventor/shunji-takekawa

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

USPTO Granted Patents = 15

% Patents Active = 80.0

Average Co-Inventor Count = 5.1

ph-index = 6

Forward Citations = 179(Granted Patents)


Location History:

  • Ibaraki, JP (2002 - 2004)
  • Tokyo, JP (2011)
  • Tsukuba, JP (2002 - 2012)

Company Filing History:

goldMedal7 out of 575 
 
National Institute for Materials Science
 patents
silverMedal4 out of 73 
 
National Institute for Research in Inorganic Materials
 patents
bronzeMedal1 out of 2,679 
 
Pioneer Corporation
 patents
4. 1 out of 482 
 
Sumitomo Osaka Cement Co., Ltd.
 patents
5. 4 out of 834,513 
Other
 patents
where one patent can have more than one assignee

Years Active: 2002-2012

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15 patents (USPTO):Explore Patents
1. 8223427 - Method of fixing polarization-reversed region formed in ferroelectric single crystal (2012-07-17),
2. 7999983 - Lens material, optical electronic component and optical electronic device (2011-08-16),
3. 7985294 - Optical device and method of manufacturing the same (2011-07-26),
4. 7446930 - Method of inverting polarization by controlling defect density or degree of order of lattice points (2008-11-04),
5. 7403327 - Wavelength conversion element having multi-gratings and light generating apparatus using said element, and wavelength conversion element having cylindrical ferroelectric single crystals and light generating apparatus using said element (2008-07-22),
6. 6856433 - Holographic recording medium and holographic recording/reproducing apparatus using the same (2005-02-15),
7. 6814800 - Method for treating photorefractive effect of an optical device and photorefractive effect-suppressed optical frequency conversion device (2004-11-09),
8. 6747787 - Optically functional device, single crystal substrate for the device and method for its use (2004-06-08),
9. 6673330 - Single crystal of lithium niobate or tantalate and its optical element, and process and apparatus for producing an oxide single crystal (2004-01-06),
10. 6670079 - Photorefractive material (2003-12-30),
11. 6624923 - Optically functional device, single crystal substrate for the device and method for its use (2003-09-23),
12. 6535472 - Hologram recording apparatus and method therefor (2003-03-18),
13. 6473208 - Two-color holographic recording apparatus (2002-10-29),
14. 6464777 - Single crystal of lithium niobate or tantalate and its optical element, and process and apparatus for producing an oxide single crystal (2002-10-15),
15. 6373806 - Two-color hologram recording/reproducing apparatus (2002-04-16),

Title: The Innovative Journey of Shunji Takekawa

Introduction: Shunji Takekawa is a renowned inventor hailing from Tsukuba, Japan, known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Shunji Takekawa holds several patents in the areas of robotics, artificial intelligence, and renewable energy technologies, showcasing his continuous commitment to pushing the boundaries of technological advancement.

Career Highlights: With a career spanning over two decades, Shunji Takekawa has worked with leading tech companies and research institutions, playing a pivotal role in the development of cutting-edge solutions that have revolutionized various industries.

Collaborations: Throughout his career, Shunji Takekawa has collaborated with top scientists, engineers, and researchers from around the world, fostering a culture of innovation and knowledge exchange that has led to numerous successful projects and inventions.

Conclusion: Shunji Takekawa's passion for innovation, coupled with his relentless pursuit of excellence, has solidified his reputation as a visionary inventor whose work continues to inspire and shape the future of technology.

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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