Yasu, Japan

Masao Yamamoto

This inventor holds 4 USPTO granted patents and 1 published patent application and 1 EPO patent. Top assignees: Matsushita Electric Works, Ltd., Panasonic Electric Works Power Tools Co., Ltd.. Active years: 1991-2013.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masao Yamamoto. Retrieved from https://idiyas.com/inventor/masao-yamamoto-ez5e1dcf

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

Calculating rank
USPTO Granted Patents = 4 

% Patents Active = 50.0


Average Co-Inventor Count = 3.7

ph-index = 3

Forward Citations = 141(Granted Patents)


Location History:

  • Yasu-gun, JP (2004)
  • Shiga, JP (2005)
  • Yasu, JP (1991 - 2013)

Company Filing History:


Years Active: 1991-2013

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4 patents (USPTO):Explore Patents

Title: The Innovative Mind of Masao Yamamoto

Introduction: Masao Yamamoto is a prominent inventor hailing from Yasu, Japan. With a remarkable portfolio of 4 patents, Yamamoto has made significant contributions to the fields of engineering and technology. His inventive spirit has led to the creation of devices that enhance operational efficiency and functionality.

Latest Patents: Among his notable inventions, two stand out. The first is a "Changeover Operation Device," designed to alter the positions of multiple components to facilitate three or more speed modes within a speed changer mechanism. This device features operation handles that are strategically arranged to allow seamless changes in the position of components, ensuring smooth transitions between speed settings.

The second patent is for an "Electrically Operated Vibrating Drill/Driver." This innovative tool includes a motor that drives a spindle and a switching handle that allows for torque variation based on the handle's rotation. The vibrating cam mechanism provides axial vibration to the spindle, enabling the tool to switch between clutch mode, vibrating mode, and drilling mode efficiently.

Career Highlights: Throughout his career, Masao Yamamoto has been associated with distinguished companies such as Matsushita Electric Works Ltd. and Panasonic Electric Works Power Tools Co., Ltd. His experiences in these organizations have greatly influenced his approach to invention and design.

Collaborations: Yamamoto has had the privilege of collaborating with talented colleagues like Kazuto Toyama and Yosuke Ishida. These partnerships have contributed to his innovative projects and have further enriched his inventive journey.

Conclusion: Masao Yamamoto's impressive body of work exemplifies his dedication to innovation. His patents not only highlight his technical expertise but also reflect his commitment to enhancing user experience through advanced engineering. As he continues his endeavors, Yamamoto remains an influential figure in the realm of inventions and technological advancements.

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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