Hephaist Seiko Co., Ltd.

Calculating rank

USPTO Granted Patents = 3

% Expired Patents = 33.3

Forward Citations = 13

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4 inventors (with patents filed for the assignee):

Hiroto Fukutome (1 out of 3 patents)

Koichi Ito (1 out of 12 patents)

Tadashi Fujinawa (1 out of 5 patents)

4. Kanji Asami (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 11166444 - Movable center-of-gravity tube and fishing lure having same built in (2021-11-09),

2. 7154209 - Control method and apparatus of an ultrasonic motor, and an ultrasonic motor driver and controller (2006-12-26),

3. 4420194 - Ball slideway (1983-12-13),

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USPTO Data Jan 1 1976 - Oct 27 2026

3 Patents

#116 in Shizuoka

#8,938 in Japan

Shizuoka, Japan

Hephaist Seiko Co., Ltd.

Forward Citations = 13

4 inventors:

Hiroto Fukutome (1 out of 3 patents)

Koichi Ito (1 out of 12 patents)

Tadashi Fujinawa (1 out of 5 patents)

4. Kanji Asami (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Hephaist Seiko Co., Ltd.. Retrieved from https://idiyas.com/company/hephaist-seiko-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]