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For the Inventor, By the Inventor

Susono, Japan

Nobuhiro Nakayama

This inventor holds 12 USPTO granted patents. Top assignees: Ricoh Company, Ltd., Other. Active years: 1986-1994.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Nobuhiro Nakayama. Retrieved from https://idiyas.com/inventor/nobuhiro-nakayama

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

USPTO Granted Patents = 12

% Patents Active = 100.0

Average Co-Inventor Count = 5.1

ph-index = 10

Forward Citations = 242(Granted Patents)


Location History:

  • Numazu, JP (1986 - 1987)
  • Shizuoka, JP (1990)
  • Susono, JP (1989 - 1994)

Company Filing History:

goldMedal12 out of 28,934 
 
Ricoh Company, Ltd.
 patents
silverMedal1 out of 834,453 
Other
 patents
where one patent can have more than one assignee

Years Active: 1986-1994

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12 patents (USPTO):Explore Patents
1. 5344732 - Multi-color electrophotographic image formation method (1994-09-06),
2. 5270783 - Image forming equipment having improved toner sensing (1993-12-14),
3. 5227842 - Electrophotographic image forming apparatus which controls developer (1993-07-13),
4. 5061588 - Dry type toner for electrophotography (1991-10-29),
5. 4980258 - Dry type developer for electrophotography (1990-12-25),
6. 4945022 - Triboelectric charge application member for toner comprising copolymer (1990-07-31),
7. 4933250 - Magenta color toner for developing latent electrostatic images in color (1990-06-12),
8. 4927728 - Carrier particles for use in a two-component dry-type developer (1990-05-22),
9. 4908290 - Toner for developing latent electrostatic images (1990-03-13),
10. 4841331 - Triboelectric charge application member for toner (1989-06-20),
11. 4672016 - Carrier particles for use in a developer for developing latent (1987-06-09),
12. 4584254 - Silicone resin coated carrier particles for use in a two-component (1986-04-22),

Title: Nobuhiro Nakayama: Innovator in Electrophotographic Technology

Introduction

Nobuhiro Nakayama is a prominent inventor known for his contributions to electrophotographic technology. He is based in Susono, Japan, and holds a total of 12 patents. His work has significantly advanced the field of image formation methods, particularly in multi-color printing.

Latest Patents

One of Nakayama's latest patents is a multi-color electrophotographic image formation method. This method involves forming multi-color images by developing latent electrostatic images corresponding to yellow, magenta, cyan, and black colors. The process ensures that the visible images are fixed to an image receiving member, maintaining specific relationships between reflection and transmission image densities. Another notable patent involves image forming equipment that features improved toner sensing. This equipment utilizes an AC-superposed DC electric field to develop latent images electrostatically, while also incorporating sensors that are protected from noise during operation.

Career Highlights

Throughout his career, Nakayama has worked with notable companies, including Ricoh Company, Ltd. His innovative approaches have led to advancements in image forming technologies, making significant impacts in the industry.

Collaborations

Nobuhiro Nakayama has collaborated with esteemed colleagues such as Mitsuo Aoki and Yasuo Asahina. Their combined expertise has contributed to the development of cutting-edge technologies in electrophotography.

Conclusion

Nobuhiro Nakayama's work in electrophotographic technology showcases his innovative spirit and dedication to advancing image formation methods. His patents and collaborations reflect his significant contributions to the field, making him a noteworthy figure in the world of inventions.

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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