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Shizuoka, Japan

Alphana Technology Co., Ltd.

USPTO Granted Patents = 31

Forward Citations = 74

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30 inventors (with patents filed for the assignee):

Tomoyuki Tashiro (6 out of 14 patents)

Mitsuo Kodama (5 out of 39 patents)

Hiroshi Iwai (5 out of 16 patents)

4. Yuji Omura (4 out of 15 patents)

5. Takanori Watanabe (3 out of 22 patents)

6. Takuji Yamada (2 out of 17 patents)

7. Kazuyoshi Nagai (2 out of 10 patents)

8. Taketo Nonaka (2 out of 9 patents)

9. Yusuke Tokunaga (2 out of 3 patents)

10. Hiroki Yamazaki (2 out of 4 patents)

11. Toshiki Maeda (2 out of 2 patents)

12. Hirotake Nishino (2 out of 2 patents)

13. Ryusuke Sugiki (1 out of 17 patents)

14. Kazuhiro Matsuo (1 out of 6 patents)

15. Kazuhide Kamata (1 out of 2 patents)

31 patents: Sort by Forward Citations

1. 8441759 - Fluid dynamic bearing unit and disk drive device including the same (2013-05-14),

2. 8416523 - Disk drive device with versatile shaped core for rotating a disk (2013-04-09),

3. 8408797 - Method of manufacturing bearing device component coated with photoluminescence material, bearing device component and processing device with an indicator displaying information for a signal including information in accordance with light emission of a photoluminescence material applied on bearing device (2013-04-02),

4. 8407899 - Fluid dynamic bearing, method of manufacturing fluid dynamic bearing, rotating device, and disk drive device (2013-04-02),

5. 8398308 - Disk drive device provided with fluid dynamic bearing unit (2013-03-19),

6. 8395862 - Disk drive device with motor coil wiring arrangement to reduce thickness and suppressed torque decrease (2013-03-12),

7. 8395861 - Disk drive device having fluid dynamic bearing with porous member at position in which lubricant is charged (2013-03-12),

8. 8390953 - Drive device with hub having improved impact resistance where hub meets rotating shaft (2013-03-05),

9. 8381404 - Method manufacturing of fluid dynamic bearing using cutting tool that performs micro alternating drive (2013-02-26),

10. 8368282 - Disk drive device rotationally driving recording disk (2013-02-05),

11. 8365413 - Fluid dynamic bearing filled with lubricant in work area having reduced pressure, method of manufacturing the fluid dynamic bearing, apparatus for manufacturing the fluid dynamic bearing, and rotating device (2013-02-05),

12. 8358484 - Manufacturing method of disk drive device capable of reducing amount of unbalance, disk drive device and subassembly thereof (2013-01-22),

13. 8345379 - Disk drive device equipped with a bearing unit relatively rotatably supporting a hub against base member (2013-01-01),

14. 8315011 - Disk drive device improved in stiffness of fluid dynamic bearing (2012-11-20),

15. 8312617 - Method of manufacturing a disk drive having a base member, bearing unit, drive unit and hub (2012-11-20),

ALPHANA Technology Co., Ltd. is a leading technology company specializing in software development and IT services. With a focus on innovation, we provide customized solutions to businesses across multiple industries, including finance, healthcare, and retail. Our team of highly skilled professionals is dedicated to delivering cutting-edge software solutions that enhance efficiency, productivity, and customer experience. We offer a wide range of services, including application development, system integration, cloud computing, and IT consulting. Visit our website to learn more about our services and how we can help your business thrive in the digital age.

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

Company Badge

USPTO Data Jan 1 1976 - Jan 6 2026

31 Patents

#25 in Shizuoka

#2,216 in Japan

#20,648 in the World

Shizuoka, Japan

Alphana Technology Co., Ltd.

Forward Citations = 74

30 inventors:

Tomoyuki Tashiro (6 out of 14 patents)

Mitsuo Kodama (5 out of 39 patents)

Hiroshi Iwai (5 out of 16 patents)

4. Yuji Omura (4 out of 15 patents)

5. Takanori Watanabe (3 out of 22 patents)

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