Yasuo Asahina

This inventor holds 48 USPTO granted patents, plus 1 CIPO patent and 9 EPO patents, primarily in Electrophotographic Toner. Top assignees: Ricoh Company, Ltd., Mitsui Petrochemical Industries, Ltd., Richo Company, Ltd.. Active years: 1978-2012.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yasuo Asahina. Retrieved from https://idiyas.com/inventor/yasuo-asahina

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

USPTO Granted Patents = 48

% Patents Active = 89.6

CIPO Patents = 1

EPO Patents = 9 (Patent Applications = 1)

Average Co-Inventor Count = 6.9

ph-index = 21

Forward Citations = 1,027(Granted Patents)

Location History:

Tokyo, JA (1978)
Tokyo, JP (1979 - 1981)
Yokohama, JP (1999)
Shizuoka-ken, JP (2000)
Numadu, JP (2004)
Shizuoka, JP (2002 - 2009)
Numazu, JP (1988 - 2012)

Company Filing History:

Mitsui Petrochemical Industries, Ltd.

Shin-Etsu Chemical Co., Ltd.

patents

5. 1 out of 834,513

Other

patents

where one patent can have more than one assignee

Years Active: 1978-2012

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Areas of Expertise:

Electrophotography

Image Formation

Toner Development

Process Cartridge

Dry Toner

Image Developer

Color Toner

Toner Container

Latent Electrostatic Image

Multi-Color Imaging

Carrier Development

Fixing Method

48 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 8211605 - Toner, developer, toner container, process cartridge, image forming method, and image forming apparatus (2012-07-03),

2. 7939235 - Image formation method (2011-05-10),

3. 7935469 - Image forming method and toner for developing latent electrostatic image (2011-05-03),

4. 7749674 - Toner, developer, image developer and image forming apparatus (2010-07-06),

5. 7642032 - Toner, developer, image forming apparatus and image forming method (2010-01-05),

6. 7611815 - External additive for toner for electrophotography, toner for electrophotography, double-component developer for electrophotography, image-forming process using the toner, and image-forming apparatus using the toner (2009-11-03),

7. 7566521 - Toner, developer, toner container, process cartridge, image forming apparatus, and image forming method (2009-07-28),

8. 7547497 - Toner, and developer, image developer and image forming apparatus using the toner (2009-06-16),

9. 7521164 - Toner, and, developer, toner container, process cartridge, image forming apparatus and image forming method (2009-04-21),

10. 7455942 - Toner, developer, toner container, process cartridge, image forming apparatus, and image forming method using the same (2008-11-25),

11. 7442484 - Image forming method using toner (2008-10-28),

12. 7374851 - Toner, and, developer, toner container, process cartridge, image forming apparatus and image forming method (2008-05-20),

13. 7368213 - Toner and fixing device and image forming device using the same (2008-05-06),

14. 7368212 - Toner for developing electrostatic image, developer, image forming apparatus, process for forming image, process cartridge and process for measuring porosity of toner (2008-05-06),

15. 7318989 - Toner, developer, toner container, process cartridge, image forming apparatus, and image forming method (2008-01-15),

Title: **Yasuo Asahina: Innovator in Toner Technology**

Introduction

Yasuo Asahina, an accomplished inventor based in Numazu, Japan, has made significant contributions to the field of toner technology with an impressive portfolio of 48 patents. His innovations range from advanced toner formulations to cutting-edge image forming methods, reflecting his expertise in the industry.

Latest Patents

Among his latest patents, Asahina has developed a toner that includes a binder resin and a layered inorganic compound. This compound is uniquely cleaved to create particles within the toner, measuring between 0.5 nm and 4 nm in breadth and 10 nm to 90 nm in length. Additionally, his image formation method incorporates a polyol-based resin, ensuring an optimal ratio of epoxy to hydroxyl groups. Furthermore, he has established specific parameters for a stirring and transfer device to enhance performance during toner development, including the range for rotational speed and temperature during operations.

Career Highlights

Throughout his career, Yasuo Asahina has worked with renowned companies such as Ricoh Company, Ltd. and Shin-etsu Chemical Co., Ltd. His extensive experience in these organizations has fostered advancements in imaging technology, particularly in the realm of color printing and toner applications.

Collaborations

Asahina has collaborated with notable colleagues such as Satoshi Mochizuki and Hideki Sugiura, working alongside these talented individuals to push the boundaries of innovation in toner and developer technologies. Their combined expertise has played a crucial role in the success of numerous projects.

Conclusion

Yasuo Asahina stands out as a leading inventor in the toner technology sector. With his innovative patents and collaborations, he is not only enhancing current imaging processes but also paving the way for future developments in the industry. His contributions are a testament to the vital role of ingenuity in the field of inventions.

Profile summary based on public USPTO records.