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For the Inventor, By the Inventor

Tokyo, Japan

Takeo Kagami

USPTO Granted Patents = 50 

Average Co-Inventor Count = 3.0

ph-index = 7

Forward Citations = 205(Granted Patents)

Forward Citations (Not Self Cited) = 191(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Chuo-ku, JP (2006 - 2011)
  • Chou-ku, JP (2011)
  • Toyko, JP (2012)
  • Tokyo, JP (2003 - 2014)

Company Filing History:

goldMedal50 out of 7,968 
 
Tdk Corporation
 patents
silverMedal1 out of 1 
 
Sae Magnectics (h.k.) Ltd.
 patent
where one patent can have more than one assignee

Years Active: 2003-2014

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Areas of Expertise:
Magnetic Recording
Magnetoresistive Devices
Thin Film Technology
Magnetic Heads
Tunneling Magnetoresistance
Magnetic Memory
Head Gimbal Assembly
Magnetic Bias Layers
Noise Testing
Manufacturing Methods
Magnetic Storage Cells
Composite Thin-Film Heads
50 patents (USPTO):Explore Patents
1. 8867168 - Magnetic head for perpendicular magnetic recording having a write shield (2014-10-21),
2. 8559133 - Perpendicular magnetic write head and magnetic write device (2013-10-15),
3. 8427790 - Thin film magnetic head having similarly structured resistive film pattern and magnetic bias layer (2013-04-23),
4. 8300359 - Perpendicular magnetic recording head and magnetic recording device (2012-10-30),
5. 8240026 - Method of manufacturing a magneto-resistive device (2012-08-14),
6. 8233237 - Perpendicular magnetic write head and magnetic recording device (2012-07-31),
7. 8144427 - Magnetic head, head assembly and magnetic recording/reproducing apparatus (2012-03-27),
8. 8117736 - Method of lapping a magnetic head slider (2012-02-21),
9. 8085038 - Method for testing noise of thin-film magnetic head, and magnetic disk drive apparatus with noise testing function (2011-12-27),
10. 8077436 - CPP-type magnetoresistance effect element having three magnetic layers (2011-12-13),
11. 7950135 - Manufacturing method of magnetoresistive effect element (2011-05-31),
12. 7916430 - Thin-film magnetic head and manufacturing method thereof (2011-03-29),
13. 7898775 - Magnetoresistive device having bias magnetic field applying layer that includes two magnetic layers antiferromagnetically coupled to each other through intermediate layer (2011-03-01),
14. 7876537 - Magnetoresistive element incorporating conductive film disposed on peripheral surface of layered structure including spacer layer, free layer and pinned layer, the conductive film allowing conduction between the free layer and the pinned layer (2011-01-25),
15. 7864489 - Thin-film magnetic head having an antistatic layer preventing a protective coat from being electrostatically charged (2011-01-04),

Title: **Takeo Kagami: Innovator in Magnetic Recording Technology**

Introduction

Takeo Kagami is a prominent inventor based in Tokyo, JP, known for his significant contributions to the field of magnetic recording technology. With a remarkable portfolio of 50 patents, he has made substantial advancements that impact the efficiency and functionality of magnetic recording devices.

Latest Patents

Among his latest innovations, two notable patents stand out. The first patent is for a **Magnetic head for perpendicular magnetic recording having a write shield**. This invention features a main pole, a write shield, and a return path section, optimizing the magnetic head's performance. The write shield contains first and second shield portions on either side of the main pole, while the return path section incorporates first and second yoke portions, enhancing the magnetic write efficiency.

The second patent involves a **Perpendicular magnetic write head and magnetic write device**. This write head comprises a magnetic pole with a specialized end face on an air bearing surface, along with side shield layers arranged strategically on both sides of the magnetic pole. This design allows for improved magnetic recording by maintaining specific geometric relationships of gap lengths between the edges, thus facilitating higher precision in data writing.

Career Highlights

Throughout his career, Takeo Kagami has worked with leading companies in the technology sector, including TDK Corporation and SAE Magnetics (H.K.) Ltd. His expertise and innovative spirit have allowed him to significantly contribute to the development of advanced magnetic recording technologies.

Collaborations

Kagami has collaborated with several talented individuals, including Kazuki Sato and Tetsuya Kuwashima. These collaborations have enabled the pooling of knowledge and expertise, leading to groundbreaking advancements in their field.

Conclusion

Takeo Kagami continues to be a driving force in the realm of magnetic recording technology. His numerous patents and innovative designs showcase his commitment to pushing the boundaries of engineering and technology. As the industry evolves, his contributions will unquestionably play a crucial role in shaping the future of data storage and retrieval.

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