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For the Inventor, By the Inventor

Sakura, Japan

Keiji Ohashi

This inventor holds 15 USPTO granted patents, primarily in Optical Fiber Technology. Top assignee: Fujikura Limited. Active years: 2004-2009.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Keiji Ohashi. Retrieved from https://idiyas.com/inventor/keiji-ohashi

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

Calculating rank
USPTO Granted Patents = 15

% Patents Active = 40.0

Average Co-Inventor Count = 4.3

ph-index = 5

Forward Citations = 269(Granted Patents)


Location History:

  • Chiba, JP (2004 - 2008)
  • Sakura, JP (2004 - 2009)

Company Filing History:

goldMedal15 out of 1,875 
 
Fujikura Limited
 patents

Years Active: 2004-2009

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Areas of Expertise:
Optical Fiber
Dispersion Compensation
Fiber Cable
Coating Layer
Manufacturing Method
Thermal Expansion
Air Blown Fiber
Identification Member
Drop Cable
Resin Liquid
Optical Fiber Module
Fiber Installation
15 patents (USPTO):Explore Patents
1. 7496261 - Dispersion compensating optical fiber and dispersion compensating optical fiber module (2009-02-24),
2. 7421169 - Optical fiber cable (2008-09-02),
3. 7072554 - Optical fiber and optical fiber cable using the same (2006-07-04),
4. 7068908 - Resin liquid for optical fiber coating layer (2006-06-27),
5. 6973243 - Cable (2005-12-06),
6. 6965719 - Dispersion compensating optical fiber and dispersion compensating optical fiber module (2005-11-15),
7. 6931190 - Optical fiber unit for air blown fiber installation (2005-08-16),
8. 6915050 - Identification member in slots in the core of an optical fiber cable (2005-07-05),
9. 6870994 - Optical fiber cord, manufacturing method thereof, and manufacturing apparatus thereof (2005-03-22),
10. 6862390 - Optical fiber drop cable (2005-03-01),
11. 6853782 - Optical fiber drop cable (2005-02-08),
12. 6834148 - Optical fiber cord and manufacturing method thereof (2004-12-21),
13. 6804442 - Optical fiber and optical fiber cable having a first jacket layer and a second jacket layer and a coefficient of thermal expansion selecting method (2004-10-12),
14. 6775445 - Optical fiber drop cable (2004-08-10),
15. 6728455 - Optical fiber drop cable and manufacturing method thereof (2004-04-27),

Title: Keiji Ohashi: Innovator in Optical Fiber Technology

Introduction

Keiji Ohashi is a prominent inventor based in Sakura, Japan. He has made significant contributions to the field of optical fiber technology, holding a total of 15 patents. His work has been instrumental in advancing the capabilities of optical fibers, particularly in terms of dispersion compensation and durability.

Latest Patents

Ohashi's latest patents include innovative designs for dispersion compensating optical fibers and optical fiber cables. The dispersion compensating optical fiber for NZ-DSFs features an uncovered dispersion compensating optical fiber, a double-layered resin coating, and an outer coating layer that contains silicone. This design ensures optimal adhesive properties and enhances the performance of the optical fiber. Additionally, his optical fiber cable is engineered to minimize transmission loss and breakage under external pressure, incorporating central buffer filaments and circumferential strength filaments for added durability.

Career Highlights

Keiji Ohashi has dedicated his career to research and development in optical fiber technology. He is currently associated with Fujikura Limited, a leading company in the field. His innovative designs and patents have positioned him as a key figure in the advancement of optical communication technologies.

Collaborations

Ohashi has collaborated with notable colleagues such as Kazunaga Kobayashi and Masahiro Kusakari. Their combined expertise has contributed to the successful development of cutting-edge optical fiber solutions.

Conclusion

Keiji Ohashi's contributions to optical fiber technology have had a lasting impact on the industry. His innovative patents and collaborative efforts continue to drive advancements in this critical field.

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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