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For the Inventor, By the Inventor

Sakai, Japan

Masanori Fujii

This inventor holds 11 USPTO granted patents. Top assignee: Mita Industrial Co., Ltd.. Active years: 1983-1993.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masanori Fujii. Retrieved from https://idiyas.com/inventor/masanori-fujii

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

USPTO Granted Patents = 11

% Patents Active = 100.0

Average Co-Inventor Count = 3.8

ph-index = 5

Forward Citations = 62(Granted Patents)


Location History:

  • Suita, JP (1983 - 1985)
  • Sakai, JP (1983 - 1993)

Company Filing History:

goldMedal11 out of 1,344 
 
Mita Industrial Co., Ltd.
 patents

Years Active: 1983-1993

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11 patents (USPTO):Explore Patents
1. 5272034 - Process for producing electrophotographic toner (1993-12-21),
2. 5077168 - Toner for electrophotography and process for preparation thereof (1991-12-31),
3. 4855204 - White toner containing a high purity titanium dioxide pigment (1989-08-08),
4. 4665001 - Negatively chargeable blue toner comprising indanthrone dye (1987-05-12),
5. 4645729 - Method for preventing offset in electrophotography (1987-02-24),
6. 4504562 - One-component type magnetic developer comprises particles of cubic (1985-03-12),
7. 4416964 - Dry magnetic developer containing a non-pulverizing agglumerate of cubic (1983-11-22),
8. 4414322 - Two-component type magnetic developer (1983-11-08),
9. 4414321 - Dry composite blended magnetic developer of resin encapsulated fine (1983-11-08),
10. 4407923 - One component magnetic developer (1983-10-04),
11. 4404269 - Developer containing magnetic and non-magnetic toner (1983-09-13),

Title: Masanori Fujii: Innovator in Electrophotographic Toner Technology

Introduction

Masanori Fujii is a prominent inventor based in Sakai, Japan. He has made significant contributions to the field of electrophotography, particularly in the development of advanced toner technologies. With a total of 11 patents to his name, Fujii's work has had a lasting impact on the industry.

Latest Patents

Fujii's latest patents include a process for producing electrophotographic toner. This innovative process involves dispersing and mixing toner components, which include a fixing resin, a coloring agent, and an electric charge controlling dye. The mixture is then melted, kneaded, pulverized, and classified. Notably, fine powder generated during the pulverizing and classifying steps is reused, enhancing the efficiency of the toner production. The resulting toner exhibits excellent electric charging characteristics, even after prolonged use. Another significant patent is for a toner that comprises a styrene/acrylic copolymer with multiple molecular weight distribution peaks. This toner allows for a broader fixing-possible temperature range while maintaining high performance.

Career Highlights

Fujii is currently employed at Mita Industrial Co., Ltd., where he continues to innovate in the field of electrophotography. His work has been instrumental in advancing toner technology, making it more efficient and effective for various applications.

Collaborations

Fujii has collaborated with notable colleagues, including Nobuhiro Miyakawa and Kouzi Maekawa. Their combined expertise has contributed to the successful development of new technologies in the field.

Conclusion

Masanori Fujii's contributions to electrophotographic toner technology have established him as a key figure in the industry. His innovative patents and collaborative efforts continue to shape the future of toner production and application.

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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