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Shizuoka, Japan

Alphana Technology Co., Ltd.

USPTO Granted Patents = 31

% Expired Patents = 90.3

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 16 patents)

5. Takanori Watanabe (3 out of 22 patents)

6. Takuji Yamada (2 out of 18 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)

Core Competencies:

Fluid Dynamic Bearing

Disk Drive Device

Manufacturing Method

Motor Coil Wiring

Lubricant

Impact Resistance

Airtight Structure

Vibration Reduction

Photoluminescence Material

Rotational Frequency

Micro Alternating Drive

Torque Decrease

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),

Company Overview

Alphana Technology Co., Ltd. is a Japanese company based in Shizuoka, specializing in advanced technology solutions. The organization focuses on the development and manufacturing of innovative products in the fields of electronics and automation. With a commitment to research and development, Alphana aims to enhance efficiency and performance across various industries, leveraging cutting-edge technologies to meet the evolving needs of its clients. The company plays a significant role in driving technological advancements within the region.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

31 Patents

#33 in Shizuoka

#2,272 in Japan

#21,284 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 16 patents)

5. Takanori Watanabe (3 out of 22 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Alphana Technology Co., Ltd.. Retrieved from https://idiyas.com/company/alphana-technology-company

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

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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