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For the Inventor, By the Inventor

Hitachi, Japan

Hiroshi Kajioka

This inventor holds 16 USPTO granted patents, primarily in Optical Fiber Technology. Top assignees: Hitachi Cable, Inc., Hitachi, Ltd., Hitachi Cable Co., Ltd.. Active years: 1985-1997.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiroshi Kajioka. Retrieved from https://idiyas.com/inventor/hiroshi-kajioka

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

Calculating rank
USPTO Granted Patents = 16

% Patents Active = 100.0

Average Co-Inventor Count = 3.4

ph-index = 9

Forward Citations = 392(Granted Patents)


Location History:

  • Tsuchiura-shi, Ibaraki JP (1993)
  • Tsuchiura, JP (1993)
  • Moriya, JP (1995)
  • Hitachi, JP (1985 - 1996)
  • Ibaraki-ken, JP (1996 - 1997)
  • Moriya-machi, JP (1997)
  • Ibaraki, JP (1997)

Company Filing History:

goldMedal14 out of 836 
 
Hitachi Cable, Inc.
 patents
silverMedal4 out of 42,760 
 
Hitachi, Ltd.
 patents
bronzeMedal1 out of 4 
 
Hitachi Cable Co., Ltd.
 patents
4. 1 out of 834,708 
Other
 patents
where one patent can have more than one assignee

Years Active: 1985-1997

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Areas of Expertise:
Optical Fiber Gyro
Polarization-Maintaining Fiber
Fault Detection
Angular Velocity Correction
Interference Sensor
Elliptic Core Fiber
Fiber-Optic Rotation Sensor
Optical Branching Unit
Single-Polarization Fiber
Rotary Joint
Harmonics
Data Storage
16 patents (USPTO):Explore Patents
1. 5701177 - Method for detecting fault of optical fiber gyro and apparatus for (1997-12-23),
2. 5677973 - Method of aligning optical fiber to optical fiber or optical fiber to (1997-10-14),
3. 5608525 - Phase adjustable optical fiber gyro using both even order harmonics and (1997-03-04),
4. 5555235 - Optical fiber gyro with memory storing data measured under application (1996-09-10),
5. 5482525 - Method of producing elliptic core type polarization-maintaining optical (1996-01-09),
6. 5471301 - Optical fiber gyro (1995-11-28),
7. 5396327 - Fiber-optic gyroscope having angular velocity correction (1995-03-07),
8. 5264914 - Interference sensor and method utilizing extracted alliasing frequency (1993-11-23),
9. 5239362 - Fiber-optic rotation sensor (1993-08-24),
10. 5208652 - An improved optical branching/coupling unit for an optical fiber (1993-05-04),
11. 4859223 - Method of manufacturing polarization-maintaining optical fibers (1989-08-22),
12. 4848867 - Rotary joint for polarization plane maintaining optical fibers (1989-07-18),
13. 4818047 - Polarized wave preserving fiber (1989-04-04),
14. 4584470 - Single-polarization fiber optics magnetic sensor (1986-04-22),
15. 4500168 - Single polarization optical fibers (1985-02-19),

Title: Hiroshi Kajioka: Innovator in Optical Fiber Technology

Introduction

Hiroshi Kajioka is a prominent inventor based in Hitachi, Japan. He has made significant contributions to the field of optical fiber technology, holding a total of 16 patents. His work focuses on methods and apparatuses that enhance the functionality and reliability of optical fiber systems.

Latest Patents

Kajioka's latest patents include a method for detecting faults in optical fiber gyros. This innovative approach involves propagating a phase-modulated light through an optical fiber sensing loop. The propagated light is converted into an electric signal, allowing for the detection of fundamental wave components and even-number harmonic wave components of the phase-modulating signal. By analyzing these components, faults can be identified effectively. Additionally, he has developed a method for aligning optical fibers, which takes into account the positional axial displacement in an optical fiber array. This method utilizes an image pick-up means to obtain an enlarged image of each optical fiber, enabling precise measurement and alignment.

Career Highlights

Throughout his career, Kajioka has worked with notable companies such as Hitachi Cable, Inc. and Hitachi, Ltd. His experience in these organizations has allowed him to refine his expertise in optical fiber technology and contribute to various advancements in the field.

Collaborations

Kajioka has collaborated with esteemed colleagues, including Tatsuya Kumagai and Hisao Sonobe. These partnerships have fostered innovation and have been instrumental in the development of his patented technologies.

Conclusion

Hiroshi Kajioka's contributions to optical fiber technology have established him as a leading inventor in his field. His innovative patents and collaborations reflect his commitment to advancing technology and improving the reliability of optical systems.

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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