Saitama, Japan

Hiroki Tawa

This inventor holds 33 USPTO granted patents and 1 published patent application, plus 6 CIPO patents and 2 EPO patents, primarily in Outboard Engine Technology. Top assignees: Honda Motor Co., Ltd., Honda Giken Kogyo Kabushiki Kaisha. Active years: 1999-2023.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiroki Tawa. Retrieved from https://idiyas.com/inventor/hiroki-tawa

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

USPTO Granted Patents = 33 

% Patents Active = 45.5


 

Average Co-Inventor Count = 2.6

ph-index = 7

Forward Citations = 159(Granted Patents)


Location History:

  • Saitama, JP (2005 - 2013)
  • Wako, JP (1999 - 2023)

Company Filing History:


Years Active: 1999-2023

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Areas of Expertise:
Outboard Motor
Vertical Engine
Water-Cooled Engine
Hydraulic Mechanism
Steering System
Gas-Liquid Separation
Engine Cooling
Internal Combustion Engine
Engine System
Marine Engine
Exhaust Gas Sampling
Oil Strainer
33 patents (USPTO):Explore Patents

Title: Hiroki Tawa: Innovator in Engine Technology

Introduction

Hiroki Tawa, an inventor based in Saitama, Japan, has made significant contributions to the field of engine technology, holding a remarkable total of 33 patents. His innovative work primarily focuses on enhancing the efficiency and functionality of internal combustion engines and outboard motor units.

Latest Patents

Among Hiroki Tawa's latest patents is the design of an internal combustion engine that features two intake pipe portions designed for guiding intake air to two banks. This inventive engine also includes a blow-by gas recirculation pathway that leads blow-by gas from a cylinder head or crank case back to the two intake pipe portions. A distribution passage between the intake pipe portions effectively distributes the blow-by gas, ensuring optimal flow and performance. Another notable patent is for an internal oil strainer specifically developed for outboard motor units, where an oil tube is secured by two O-ring seal members that enhance the reliability and functionality of the oil strainer.

Career Highlights

Hiroki Tawa has worked with renowned companies such as Honda Motor Co., Ltd. and Honda Giken Kogyo Kabushiki Kaisha, where he has applied his inventive skills and technical expertise. His work has consistently contributed to advancements in automotive technologies, particularly in improving engine efficiency.

Collaborations

Throughout his career, Tawa has collaborated with esteemed colleagues, including Hideaki Takada and Yoshihiko Fukuda. These partnerships have fostered an innovative environment, allowing for the exchange of ideas and the advancement of new technologies in the automotive field.

Conclusion

Hiroki Tawa stands out as a key figure in the innovation of engine technology. His array of patents reflects his commitment to enhancing automotive performance and functionality. As he continues to innovate, Tawa's contributions are likely to shape the future of engine design and operation.

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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