Tokyo, Japan

Shigeaki Ohkawara

This inventor holds 1 USPTO granted patent. Top assignee: Tobishima Corporation. Active years: 1988.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Shigeaki Ohkawara. Retrieved from https://idiyas.com/inventor/shigeaki-ohkawara

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


% Patents Active = 100.0

Average Co-Inventor Count = 2.0

ph-index = 1

Forward Citations = 5(Granted Patents)


Company Filing History:


Years Active: 1988

Loading Chart...
1 patent (USPTO):Explore Patents

Title: Shigeaki Ohkawara: Innovator in Underwater Construction

Introduction: Shigeaki Ohkawara is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of underwater construction, particularly with his innovative designs and structures. His work has garnered attention for its practicality and effectiveness in marine environments.

Latest Patents: Ohkawara holds a patent for a unique underwater pile-framed structure. This invention comprises a plurality of upright piles arranged in two parallel and spaced rows. The structure includes reinforcing cages surrounding the piles in a peripherally spaced relationship, along with precast block stacks that connect the piles in the two rows. The design allows for the piles to be driven into the seabed, with the reinforcing cages lowered over the piles to predetermined positions. The blocks are then stacked over the cages to connect the pile-cage assemblies, and concrete is poured into the annular clearances between the piles and the block stacks. This innovative approach enhances the stability and durability of underwater structures.

Career Highlights: Shigeaki Ohkawara is associated with Tobishima Corporation, where he has applied his expertise in construction and engineering. His work at the company has allowed him to develop and refine his inventions, contributing to advancements in the field.

Collaborations: Ohkawara has worked alongside his coworker, Yukio Oka, to further enhance their projects and innovations. Their collaboration has been instrumental in the development of effective underwater construction techniques.

Conclusion: Shigeaki Ohkawara's contributions to underwater construction through his innovative patent demonstrate his commitment to advancing engineering solutions. His work continues to influence the industry and showcases the importance of creativity in addressing complex challenges.

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]
Loading…