Ibaraki, Japan

Shigeo Koyama

This inventor holds 23 USPTO granted patents, primarily in Electrostatic Copying Technology. Top assignee: Mita Industrial Co., Ltd.. Active years: 1981-1997.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Shigeo Koyama. Retrieved from https://idiyas.com/inventor/shigeo-koyama

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


% Patents Active = 100.0

Average Co-Inventor Count = 2.9

ph-index = 11

Forward Citations = 308(Granted Patents)


Location History:

  • Toyonaka, JP (1981 - 1984)
  • Higashi Osaka, JP (1985 - 1986)
  • Ibaragi, JP (1990)
  • Ibaraki, JP (1986 - 1993)
  • Osaka, JP (1984 - 1997)

Company Filing History:


Years Active: 1981-1997

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Areas of Expertise:
Ink Jet Printing
Image Forming
Electrostatic Copying
Developer Agitating
Process Units
Toner Replenishing
Photosensitive Drum
Copying Apparatus
Variable Magnification
Paper Supply System
Cleaning Devices
Drum Unit Exchange
23 patents (USPTO):Explore Patents

Title: Shigeo Koyama - Innovator in Ink Jet Technology

Introduction

Shigeo Koyama, located in Ibaraki, Japan, is a distinguished inventor with a remarkable portfolio of 23 patents to his name. His contributions primarily focus on innovations within the fields of ink jet printing and image forming apparatuses.

Latest Patents

Koyama's latest patents showcase his ingenuity in ink jet technology. The first patent describes an ink jet printing apparatus that features a printing head capable of emitting ink onto a printing sheet. This apparatus includes a sheet transporter to move the printing sheet perpendicularly to the printing head's motion, alongside a head moving mechanism for reciprocal movement along the primary direction. The controller is designed to facilitate two printing modes, enhancing operational flexibility.

Another significant invention is an image forming apparatus utilized in devices such as copying machines. This apparatus incorporates a sealing member positioned between a transparent platen and its frame member, thereby enhancing sealing properties. This innovation effectively prevents external air from entering the apparatus, thus mitigating image degradation and reducing toner consumption.

Career Highlights

Shigeo Koyama is affiliated with Mita Industrial Co., Ltd., where he applies his expertise in developing advanced technological solutions. His work at the company has significantly contributed to the evolution of printing technology and efficiency.

Collaborations

Throughout his career, Koyama has collaborated with notable colleagues, including Nobuhiko Kozuka and Ryutaro Yamagata. These partnerships have fostered a collaborative innovation environment, resulting in the development of cutting-edge technologies in their field.

Conclusion

In summary, Shigeo Koyama stands out as a prominent figure in the realm of ink jet technology and image forming apparatuses. His 23 patents reflect his commitment to innovation and excellence, making him a valuable contributor to advancements in printing technology. His ongoing work at Mita Industrial Co., Ltd. continues to influence the industry positively, signaling a bright future for further innovations.

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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