Hirofumi Sato

This inventor holds 8 USPTO granted patents. Top assignees: Brother Kogyo Kabushiki-Kaisha, Brother Industries, Ltd.. Active years: 2000-2009.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hirofumi Sato. Retrieved from https://idiyas.com/inventor/hirofumi-sato-8npjjuss

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

Calculating rank

USPTO Granted Patents = 8

% Patents Active = 87.5

Average Co-Inventor Count = 2.5

ph-index = 6

Forward Citations = 118(Granted Patents)

Company Filing History:

5 out of 17,897

Brother Kogyo Kabushiki-Kaisha

patents

3 out of 999

Brother Industries, Ltd.

patents

Years Active: 2000-2009

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8 patents (USPTO):Sort by Forward CitationsExplore Patents

1. D601184 - Photosensitive drum unit (2009-09-29),

2. D601183 - Toner cartridge (2009-09-29),

3. D595343 - Toner cartridge (2009-06-30),

4. 6812421 - Key switch device, keyboard with the key switch device, and electronic device with the keyboard (2004-11-02),

5. 6586695 - Electronic apparatus including keyboard with key switch device (2003-07-01),

6. 6455794 - Key switch device, keyboard with the key switch device, and electronic apparatus with the keyboard (2002-09-24),

7. 6371671 - Key switch device, keyboard with the key switch device, and electronic apparatus with the keyboard (2002-04-16),

8. 6072134 - Key switch device (2000-06-06),

Title: Hirofumi Sato: Innovator in Toner Cartridge Technology

Introduction

Hirofumi Sato is a notable inventor based in Gifu, Japan. He has made significant contributions to the field of imaging technology, particularly in the development of toner cartridges and photosensitive drum units. With a total of 8 patents to his name, Sato has established himself as a key figure in the industry.

Latest Patents

Among his latest innovations are patents related to toner cartridges and photosensitive drum units. These inventions have played a crucial role in enhancing the efficiency and performance of printing devices.

Career Highlights

Sato has had a distinguished career, working with prominent companies such as Brother Kogyo Kabushiki-Kaisha and Brother Industries, Ltd. His work in these organizations has allowed him to develop and refine his inventions, contributing to advancements in printing technology.

Collaborations

Throughout his career, Sato has collaborated with talented individuals, including Isao Mochizuki and Satoru Ishikawa. These partnerships have fostered innovation and creativity in his projects.

Conclusion

Hirofumi Sato's contributions to toner cartridge technology and his collaborations with industry professionals highlight his importance as an inventor. His work continues to influence the field of imaging technology, making a lasting impact on the industry.

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]