Kazumi Oi

This inventor holds 14 USPTO granted patents and 16 published patent applications, plus 4 CIPO patents and 5 EPO patents, primarily in Degassing Technology. Top assignees: Dic Corporation, Dainippon Ink and Chemicals, Incorporated. Active years: 2000-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kazumi Oi. Retrieved from https://idiyas.com/inventor/kazumi-oi

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

Calculating rank

USPTO Granted Patents = 14 (Patent Applications = 16)

% Patents Active = 100.0

CIPO Patents = 4 (Patent Applications = 2)

EPO Patents = 5 (Patent Applications = 9)

Average Co-Inventor Count = 3.3

ph-index = 2

Forward Citations = 51(Granted Patents)

Location History:

Chiba, JP (2019 - 2022)
Ichihara, JP (2000 - 2023)

Company Filing History:

Dainippon Ink and Chemicals, Incorporated

patents

Years Active: 2000-2026

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Areas of Expertise:

Degassing Apparatus

Resistivity Adjustment

Hollow Fiber Module

Liquid Degasification

Inkjet Printer

Specific Resistance

Ultra Pure Water

Degasification System

Carbon Dioxide Addition

Resistivity Regulation

Production Method

Natural Resources

14 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12702961 - Resistivity adjustment device and resistivity adjustment method (2026-08-11),

2. 12629637 - Degassing apparatus (2026-05-19),

3. 12409418 - Hollow fiber degassing module, inkjet printer, and method for degassing liquid (2025-09-09),

4. 12115505 - Resistivity value regulating device and resistivity value regulating method (2024-10-15),

5. 12090445 - Tube unit and degassing module (2024-09-17),

6. 11602703 - Degasification system, liquid degasification method, degasification module, method for manufacturing degasification system, and method for producing natural resources (2023-03-14),

7. 11542185 - Resistivity adjustment device and resistivity adjustment method (2023-01-03),

8. 11524267 - Resistivity value regulating device and resistivity value regulating method (2022-12-13),

9. 11478753 - Hollow fiber membrane module and production method therefor, and epoxy resin used in hollow fiber membrane and production method (2022-10-25),

10. 10821378 - Hollow fiber degassing module, and method of degassing liquid using said hollow fiber degassing module (2020-11-03),

11. 10792623 - Device for adjusting specific resistance value and method for adjusting specific resistance value (2020-10-06),

12. 10328390 - Hollow-fiber degassing module and inkjet printer (2019-06-25),

13. 6884359 - Apparatus and method for controlling resistivity of ultra pure water (2005-04-26),

14. 6158721 - Apparatus and method for adding carbon dioxide gas to ultra pure water (2000-12-12),

Title: Kazumi Oi: Innovator in Degassing Technologies

Introduction

Kazumi Oi is a prominent inventor based in Ichihara, Japan. He has made significant contributions to the field of engineering, particularly in the development of innovative technologies related to degassing processes. With a total of 14 patents to his name, Oi has established himself as a key figure in his industry.

Latest Patents

Oi's latest patents include a variety of advanced technologies. One of his notable inventions is the hollow fiber degassing module, which features a hollow fiber membrane bundle designed to efficiently remove gases from liquids. This module includes a housing with liquid supply and discharge ports, as well as a suction port for optimal performance. Another significant patent is the resistivity value regulating device, which utilizes a gas dissolving device to regulate the resistivity of liquids. This innovative apparatus is essential for various applications requiring precise control of liquid properties.

Career Highlights

Throughout his career, Kazumi Oi has worked with several reputable companies, including Dic Corporation and Dainippon Ink and Chemicals, Incorporated. His experience in these organizations has allowed him to refine his skills and contribute to groundbreaking projects in the field of liquid processing technologies.

Collaborations

Oi has collaborated with talented individuals in his field, including Youhei Suganuma and Naoki Hada. These partnerships have fostered innovation and have led to the development of several successful projects.

Conclusion

Kazumi Oi's contributions to the field of engineering and his innovative patents have made a lasting impact on the industry. His work continues to inspire future advancements in degassing technologies and liquid processing solutions.

Profile summary based on public USPTO records.