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For the Inventor, By the Inventor

Omiya, Japan

Toshitaka Yamaguchi

This inventor holds 22 USPTO granted patents. Top assignee: Ricoh Company, Ltd.. Active years: 1995-2017.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Toshitaka Yamaguchi. Retrieved from https://idiyas.com/inventor/toshitaka-yamaguchi

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

USPTO Granted Patents = 22

% Patents Active = 77.3

Average Co-Inventor Count = 5.0

ph-index = 13

Forward Citations = 380(Granted Patents)


Location History:

  • Niiza, JP (1995)
  • Omiya, JP (1997 - 1999)
  • Ohmiya, JP (1997 - 2001)
  • Sagamihara, JP (2011 - 2012)
  • Kanagawa, JP (2010 - 2017)

Company Filing History:

goldMedal22 out of 28,934 
 
Ricoh Company, Ltd.
 patents

Years Active: 1995-2017

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22 patents (USPTO):Explore Patents
1. 9720355 - Image forming apparatus (2017-08-01),
2. 9632461 - Image forming apparatus controlling transfer bias based on temperature and humidity (2017-04-25),
3. 9459564 - Image forming apparatus (2016-10-04),
4. 8270875 - Image forming apparatus (2012-09-18),
5. 8175479 - Transfer device and image forming apparatus having first and second transfer nips and first and second contacting members which apply transfer biases (2012-05-08),
6. 8086155 - Transfer device and image forming apparatus including same (2011-12-27),
7. 7929877 - Transfer device and image forming apparatus having at least two contacting members applied with corresponding transfer biases (2011-04-19),
8. 7813683 - Belt detaching device and image forming apparatus including belt detaching device (2010-10-12),
9. 7657196 - Compact image forming apparatus with a moveable optical sensor (2010-02-02),
10. 6266501 - Image-forming apparatus having a seal for a developer and a method for detecting a removal of the seal (2001-07-24),
11. 6148161 - Image forming apparatus with improved toner density control (2000-11-14),
12. 6144822 - Image forming apparatus having detachable transfer roller and discharge (2000-11-07),
13. 6055388 - Image forming apparatus and method for obtaining appropriate toner (2000-04-25),
14. 6006050 - Image forming method and apparatus for controlling amount of supplied (1999-12-21),
15. 5923935 - Image forming apparatus with a folding transfer device support member (1999-07-13),

Title: **Toshitaka Yamaguchi: Innovator in Image Forming Technology**

Introduction

Toshitaka Yamaguchi, based in Ohmiya, Japan, is a prolific inventor known for his significant contributions to image forming technology. With a total of 22 patents to his name, Yamaguchi has demonstrated a commitment to innovation and excellence in his field.

Latest Patents

Among his latest patents, Yamaguchi has developed an advanced image forming apparatus designed to improve the efficiency and effectiveness of toner image transfer. This device features an image bearer with multiple layers and a transfer member that creates a transfer nip to facilitate the movement of the toner image. The unique aspect of this invention is its power source, which alternates between a transfer-side bias and an opposite-side bias, allowing for greater control of the toner transfer process. Additionally, Yamaguchi has created an image forming apparatus that adjusts transfer bias based on temperature and humidity. This system includes a controller that modifies the direct current component of the transfer bias in response to changing environmental conditions, ensuring optimal performance during operation.

Career Highlights

Toshitaka Yamaguchi currently works at Ricoh Company, Ltd., where he has made significant strides in the field of imaging technology. His innovative thinking and technical expertise have led to groundbreaking patents that enhance the functionality of imaging systems.

Collaborations

Throughout his career, Yamaguchi has collaborated with esteemed colleagues such as Masaru Tanaka and Haruji Mizuishi. These partnerships have further fueled his creativity, resulting in a number of advancements that have made a lasting impact on the industry.

Conclusion

In conclusion, Toshitaka Yamaguchi stands out as a notable inventor in the realm of image forming technology. His extensive portfolio of patents and collaborative spirit exemplifies his commitment to driving innovation forward. As imaging technology continues to evolve, Yamaguchi's contributions will undoubtedly play a crucial role in shaping its future.

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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