Tokyo, Japan

Masafumi Nakatsubo

This inventor holds 2 USPTO granted patents. Top assignee: Tsuda Corporation. Active years: 1992-1993.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masafumi Nakatsubo. Retrieved from https://idiyas.com/inventor/masafumi-nakatsubo

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

Calculating rank

% Patents Active = 100.0

Average Co-Inventor Count = 1.3

ph-index = 1

Forward Citations = 6(Granted Patents)


Company Filing History:


Years Active: 1992-1993

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2 patents (USPTO):Explore Patents

Title: Masafumi Nakatsubo: Innovator in Staircase Design

Introduction

Masafumi Nakatsubo is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of staircase design, holding a total of 2 patents. His innovative approach has led to the development of practical solutions for indoor staircases.

Latest Patents

One of Nakatsubo's latest inventions is the "Footboard for Indoor Staircase." This footboard is designed to be temporarily fixed to notchboards with ease. It features a unique design where the lower end portion of a riser is made free, allowing it to be used in staircases with footboards of varying riser dimensions. The footboard comprises a riser and a footstep portion formed integrally in an L-shape, characterized by a hook portion at the upper end of the riser. This design allows for easy hooking of the lower positioned footboard by the upper positioned footboard.

Another significant invention is the "Reversible Footboard for Staircase." This innovative footboard allows users to change the pattern on the same footboard by decorating both the obverse and reverse surfaces with different designs. It includes a flat portion that serves as a footstep and features an upward projecting portion for the riser and a downward projecting portion at the other end.

Career Highlights

Masafumi Nakatsubo is associated with Tsuda Corporation, where he continues to develop innovative solutions for staircase design. His work has garnered attention for its practicality and aesthetic appeal.

Collaborations

Nakatsubo collaborates with Takashi Kobayashi, contributing to the advancement of staircase technology through their combined expertise.

Conclusion

Masafumi Nakatsubo's contributions to staircase design through his innovative patents demonstrate his commitment to enhancing functionality and aesthetics in everyday structures. His work continues to influence the industry and improve user experience in residential and commercial spaces.

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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