Chiyoda, Japan

Nobuo Shiiba

This inventor holds 1 USPTO granted patent. Top assignee: Hitachi, Ltd.. Active years: 2002.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Nobuo Shiiba. Retrieved from https://idiyas.com/inventor/nobuo-shiiba

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 = 3.0

ph-index = 1

Forward Citations = 3(Granted Patents)


Company Filing History:


Years Active: 2002

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1 patent (USPTO):Explore Patents

Title: Nobuo Shiiba: Inventor of Coal Mill Cooling Technology

Introduction

Nobuo Shiiba is an inventor associated with Chiyoda, Japan, and Hitachi, Ltd. His recorded patent work concerns equipment for coal milling and the cooling of mill reduction gears. His profile lists 1 patent.

Latest Patents

Shiiba’s listed patent, “Coal Mill and Reduction Gear Used Therefor,” describes a coal mill that pulverizes raw coal between a roller and a ring. The reduction gear is positioned in the lower portion of the mill, and a cooling fan is mounted on the gear’s motor-connected input shaft. A radiator arranged along an extension of the input shaft cools the lubricating oil. An oil pump and line filter supply oil to the radiator through a passage connected by a flexible pipe. The design uses airflow to cool the coal mill and its reduction gear.

Career Highlights

Shiiba’s listed invention addresses thermal management in coal-milling equipment. By combining a shaft-mounted cooling fan with an oil-circulation system and radiator, the design supports cooling of the reduction gear’s lubricating oil during operation. His company affiliation is Hitachi, Ltd.

Collaborations

Masanori Katayama and Takeo Takahashi are identified as Shiiba’s coworkers. The available information does not specify their roles in the patent.

Conclusion

Nobuo Shiiba’s recorded patent highlights an engineering approach to cooling the reduction gear and lubricating oil in a coal mill.

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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