Keiji Ohbayashi

This inventor holds 30 USPTO granted patents, primarily in Ink Jet Technology. Top assignees: Konica Corporation, Konishiroku Photo Industry Co., Ltd.. Active years: 1983-2006.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Keiji Ohbayashi. Retrieved from https://idiyas.com/inventor/keiji-ohbayashi

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

USPTO Granted Patents = 30

% Patents Active = 93.3

Average Co-Inventor Count = 2.6

ph-index = 10

Forward Citations = 257(Granted Patents)

Location History:

Sagamihara, JP (1983)
Odawara, JP (1986)
Hachioji, JP (1993)
Hino, JP (1985 - 2004)
Tokyo, JP (1993 - 2006)

Company Filing History:

Konishiroku Photo Industry Co., Ltd.

patents

Years Active: 1983-2006

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Areas of Expertise:

Ink Jet Recording Sheet

Aqueous Coating Composition

Dye Image Forming Method

Heat Developable Material

Light-Sensitive Silver Halide

Thermal Transfer Element

Color Developing Solution

Photographic Material

Image Receiving Material

Silver Halide Color Material

Subbed Paper Support

Dye-Image Formation

30 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 7122225 - Method for preparing an ink-jet recording sheet with a constant and a falling drying rate (2006-10-17),

2. 6761942 - Ink jet recording sheet (2004-07-13),

3. 6682788 - Aqueous coating composition, coating method thereof, and ink-jet recording sheet (2004-01-27),

4. 6620470 - Ink jet recording media (2003-09-16),

5. 6613419 - Ink jet recording sheet (2003-09-02),

6. 6582802 - Ink jet recording medium (2003-06-24),

7. 6492005 - Ink jet recording sheet (2002-12-10),

8. 6436515 - Ink jet recording sheet (2002-08-20),

9. 6432550 - Ink-jet recording sheet (2002-08-13),

10. 5292611 - Dye image forming method (1994-03-08),

11. 5242781 - Dye image receiving material with polymer particles (1993-09-07),

12. 5238802 - Heat developable light-sensitive material (1993-08-24),

13. 5236886 - Thermal transfer image-receiving element (1993-08-17),

14. 5223384 - Heat-developable light-sensitive material (1993-06-29),

15. 5194362 - Subbed paper support for heat development dye diffusion transfer (1993-03-16),

Title: **Innovative Contributions of Keiji Ohbayashi in Ink-Jet Technology**

Introduction

Keiji Ohbayashi, based in Hino, Japan, has made significant strides in the field of ink-jet technology. With an impressive portfolio of 30 patents, Ohbayashi's innovations contribute to advancements in printing materials and processes. His work reflects a deep commitment to enhancing the quality and efficiency of ink-jet recording sheets.

Latest Patents

Among his most recent patents are two notable innovations:

1. **Method for preparing an ink-jet recording sheet with a constant and a falling drying rate.**

2. **An ink-jet recording sheet comprising a non-water absorptive support having thereon an ink absorptive layer comprising polyvinyl alcohol, a cationic polymer, and a compound containing a zirconium or aluminum atom other than zirconium oxide and aluminum oxide.** This specific ink absorptive layer boasts a surface pH of 4 to 6, measured 30 minutes after the application of a water-based ink of pH range 6 to 9, jetted from an ink jet printer.

Career Highlights

Throughout his career, Keiji Ohbayashi has made notable contributions while working at esteemed organizations such as Konica Corporation and Konishiroku Photo Industry Co., Ltd. His experience in these leading companies has enabled him to drive innovations that improve printing technology and material performance.

Collaborations

Ohbayashi's journey in innovation has also seen collaboration with talented individuals in his field, including Masaru Tsuchiya and Mitsuhiro Okumura. These professional relationships highlight the importance of teamwork in fostering creativity and advancing technological developments.

Conclusion

Keiji Ohbayashi stands out as a prominent inventor in the ink-jet technology sector. His contributions, reflected in his patents, showcase his dedication to improving printing materials and processes. Through his collaborations and work experience, Ohbayashi continues to play a pivotal role in shaping the future of ink-jet technology.

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]