New South Wales, Australia

David H Butler

This inventor holds 1 USPTO granted patent. Top assignees: Kabushiki Kaisha Toshiba, The Broken Hill Proprietary Company Limited. Active years: 1993.

IDiyas Innovation Intelligence. (2026). Inventor Profile: David H Butler. Retrieved from https://idiyas.com/inventor/david-h-butler

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 = 2.0

ph-index = 1

Forward Citations = 13(Granted Patents)


Company Filing History:


Years Active: 1993

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1 patent (USPTO):Explore Patents

Title: David H Butler: Innovator in Motor Control Technology

Introduction

David H Butler is an accomplished inventor based in New South Wales, Australia. He has made significant contributions to the field of motor control technology, particularly through his innovative patent. With a focus on enhancing the efficiency and performance of motor systems, Butler's work has implications for various industries.

Latest Patents

One of Butler's notable patents is titled "Method and apparatus for controlling the speed of a motor." This invention provides a sophisticated apparatus that controls the speed of a motor driving a load. The speed controller identifies the difference between a command speed value and a detected speed value, generating a command current value based on this difference. Additionally, a current controller manages the motor's current by comparing the command current value with a detected current value. A torque detector, mounted on the motor's shaft, detects the torque acting on the shaft. This information is then used to adjust the command current value, ensuring optimal acceleration torque control.

Career Highlights

Throughout his career, David H Butler has worked with prominent companies, including Toshiba Corporation and The Broken Hill Proprietary Company Limited. His experience in these organizations has allowed him to refine his skills and contribute to significant advancements in motor control technologies.

Collaborations

Butler has collaborated with various professionals in his field, including Haruo Naitoh. These partnerships have fostered innovation and the exchange of ideas, further enhancing the development of motor control systems.

Conclusion

David H Butler's contributions to motor control technology through his patent and professional collaborations highlight his role as a key innovator in the field. His work continues to influence advancements in motor efficiency and performance.

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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