For the Inventor, By the Inventor

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Hong Kong, China

Sae Magnetics (h.k.) Limited

USPTO Granted Patents = 763

Forward Citations = 4,762

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587 inventors (with patents filed for the assignee):

Yoshitaka Sasaki (177 out of 479 patents)

Hiroyuki Ito (110 out of 213 patents)

Masashi Shiraishi (94 out of 150 patents)

4. Atsushi Iijima (75 out of 107 patents)

5. Takehiro Kamigama (68 out of 84 patents)

6. Shigeki Tanemura (67 out of 174 patents)

7. Ellis T Cha (61 out of 71 patents)

8. Ryuji Fujii (58 out of 68 patents)

9. Kazuki Sato (55 out of 128 patents)

10. Naoto Matono (52 out of 54 patents)

11. MingGao Yao (50 out of 51 patents)

12. Hironori Araki (45 out of 138 patents)

13. Tatsuya Shimizu (35 out of 35 patents)

14. Ming Gao Yao (31 out of 34 patents)

15. Tatsushi Shimizu (31 out of 31 patents)

Core Competencies:

Thermally Assisted Magnetic Head

Head Gimbal Assembly

Hard Disk Drive

Microwave Assisted Magnetic Recording

MEMS Microphone

Thin-Film Piezoelectric Material

Laser Diode

Air-Bearing Surface Design

Quantum Dot Structure

Optical Image Stabilizer

Disk Drive Unit

Angle Detection Apparatus

763 patents: Sort by Forward Citations

1. 12406690 - Light source unit, thermally assisted magnetic head, head gimbal assembly, and hard disk drive (2025-09-02),

2. 12400679 - Thermally assisted magnetic head, head gimbal assembly, and hard disk drive (2025-08-26),

3. 12387750 - DFH heater design (2025-08-12),

4. 12106786 - Magnetic head, head gimbal assembly, hard disk drive, and method for processing magnetic head (2024-10-01),

5. 12106783 - Microwave-assisted magnetic recording (MAMR) head slider with diamoind-like carbon layer and a silicon nitride layer, and related head gimbal assembly and disk drive unit (2024-10-01),

6. 12027179 - Thermally assisted magnetic head, light source unit bar like member, and hard disk drive (2024-07-02),

7. 11976948 - Angle detection apparatus, angle detection system, park lock system, pedal system, and magnetic field generation module (2024-05-07),

8. 11973310 - Light source unit and thermally-assisted magnetic head (2024-04-30),

9. 11887638 - Laser diode, thermally assisted magnetic head, head gimbal assembly, hard disk drive and method of manufacturing a head gimbal assembly (2024-01-30),

10. 11817678 - Semiconductor laser and laser radar device having the semiconductor laser (2023-11-14),

11. 11781049 - Adhesive glue, curing method therefor, and application thereof (2023-10-10),

12. 11763842 - Method of manufacturing head gimbal assembly, head gimbal assembly and hard disk drive (2023-09-19),

13. 11749302 - Method of manufacturing head gimbal assembly, head gimbal assembly and hard disk drive (2023-09-05),

14. 11735212 - Thermally assisted magnetic head including a record/read separate protective structure, head gimbal assembly and hard disk drive each having the thermally assisted magnetic head (2023-08-22),

15. 11626133 - Method of manufacturing head gimbal assembly, head gimbal assembly and hard disk drive (2023-04-11),

SAE Magnetics (H.K.) Limited is a leading manufacturer of magnetic recording heads for hard disk drives. With over 30 years of experience in the industry, SAE Magnetics has become a trusted partner for major technology companies worldwide. Their state-of-the-art facilities and cutting-edge technologies enable them to deliver high-quality magnetic recording heads that meet the ever-evolving demands of the storage industry.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

763 Patents

#4 in Hong Kong

#43 in China

#1,266 in the World

Hong Kong, China

Sae Magnetics (h.k.) Limited

Forward Citations = 4,762

587 inventors:

Yoshitaka Sasaki (177 out of 479 patents)

Hiroyuki Ito (110 out of 213 patents)

Masashi Shiraishi (94 out of 150 patents)

4. Atsushi Iijima (75 out of 107 patents)

5. Takehiro Kamigama (68 out of 84 patents)

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