Saitama, Japan

Takaaki Tsukui

This inventor holds 33 USPTO granted patents and 2 EPO patents, primarily in Internal Combustion Engines. Top assignees: Honda Motor Co., Ltd., Honda Giken Kogyo Kabushiki Kaisha. Active years: 1986-2011.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Takaaki Tsukui. Retrieved from https://idiyas.com/inventor/takaaki-tsukui

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


% Patents Active = 45.5


Average Co-Inventor Count = 2.6

ph-index = 8

Forward Citations = 216(Granted Patents)


Location History:

  • Tokyo, JP (1986 - 1993)
  • Wako, JP (2006)
  • Saitama, JP (1997 - 2011)

Company Filing History:


Years Active: 1986-2011

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Areas of Expertise:
Multicylinder Engine
Internal Combustion Engine
Variable Valve Timing
Throttle Control
Cylinder Deactivation
Cooling Control Unit
Four-Stroke Engine
Exhaust System
Valve Rest Mechanism
Intake Device
Engine Control Device
Valve Operating Device
33 patents (USPTO):Explore Patents

Title: The Innovative Contributions of Takaaki Tsukui

Introduction: Takaaki Tsukui, an esteemed inventor based in Saitama, Japan, holds an impressive portfolio of 33 patents. His pioneering work primarily focuses on advancements in engine technology, particularly multicylinder engines for motorcycles.

Latest Patents: Takaaki Tsukui’s recent inventions include a groundbreaking multicylinder engine designed for vehicles. This engine features a sophisticated valve actuation mechanism equipped with a hydraulically-operated valve pausing mechanism, which can hold either an intake or an exhaust valve in a suspended state for selected cylinders. Additionally, the mechanism controls oil flow through specially designed passages, ensuring optimal functioning and efficiency. The design also includes strategically placed air-bleeding holes within the cylinder head, enhancing performance when the motorcycle is parked inclined. Another notable invention is a more streamlined mechanism for managing intake and exhaust valves through an innovative rocker arm design, which improves engine operation.

Career Highlights: Takaaki Tsukui's career includes significant tenures at reputable companies such as Honda Motor Co., Ltd. and Honda Giken Kogyo Kabushiki Kaisha. His work in these organizations has contributed greatly to the automotive industry, specifically in enhancing engine performance and reliability.

Collaborations: Throughout his career, Takaaki Tsukui has collaborated with talented individuals, including fellow inventors Hayato Maehara and Shinji Saito. Their combined expertise and innovative spirit have led to the advancement of various technologies within the field.

Conclusion: Takaaki Tsukui’s contributions to engine technology and his extensive patent portfolio underscore his role as a visionary inventor in the automotive industry. As he continues to push the boundaries of innovation, his work undoubtedly inspires future advancements in motorcycle engineering and beyond.

Profile summary based on public USPTO records.
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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