Keiji Kojima

This inventor holds 63 USPTO granted patents and 4 published patent applications, plus 1 CIPO patent and 7 EPO patents, primarily in Image Inspection Technology (CPC class 3642). Top assignees: Hitachi, Ltd., Ricoh Company, Ltd., Hitachi Computer Consultant Ltd.. Active years: 1987-2023.

USPTO Granted Patents = 63 (Patent Applications = 4)

% Patents Active = 79.4

CIPO Patents = 1

EPO Patents = 7 (Patent Applications = 10)

Average Co-Inventor Count = 2.8

ph-index = 19

Forward Citations = 1,329(Granted Patents)

Forward Citations (Not Self Cited) = 1,293(Dec 10, 2025)

Inventors with similar research interests:

Location History:

Kokubunji, JP (1987 - 1992)
Kodaira, JP (1988 - 1997)
Kawasaki, JP (1990 - 1999)
Pittsburgh, PA (US) (1995 - 2003)
Sagamihara, JP (1996 - 2008)
Kanagawa-ken, JP (2009)
Tokyo, JP (1994 - 2017)
Kanagawa, JP (2003 - 2023)

Company Filing History:

Hitachi Computer Consultant Ltd.

patents

4. 1 out of 8

Hitachi Seibu Soft Ware Co., Ltd.

Renesas Technology Corp.

patents

7. 2 out of 834,350

Other

patents

where one patent can have more than one assignee

Years Active: 1987-2023

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Areas of Expertise:

Image Inspection

Quality Evaluation

Printed Matter

Calibration Methods

Image Processing

Graphical User Interface

Visual Programming

Three Dimensional Graphics

Multimedia Systems

Character Recognition

Parallel Computing

Data Processing

63 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 11763445 - Inspection of a target object using a comparison with a master image and a strictness of a quality evaluation threshold value (2023-09-19),

2. 11312128 - Head driving device, liquid discharge apparatus, and head driving method (2022-04-26),

3. 9767546 - Image inspection apparatus, image inspection system and image inspection method (2017-09-19),

4. D797130 - Display screen with graphical user interface (2017-09-12),

5. D791869 - Writing paper (2017-07-11),

6. 9310737 - Image inspection of printed matter with a master image (2016-04-12),

7. 9233551 - Apparatus, system, and method of inspecting image, and recording medium storing image inspection control program (2016-01-12),

8. 9185240 - Image test apparatus, image test system, and image test method (2015-11-10),

9. 9172824 - Apparatus, system, and method of inspecting image, and recording medium storing image inspection control program (2015-10-27),

10. 9088745 - Apparatus, system, and method of inspecting image, and recording medium storing image inspection control program (2015-07-21),

11. 9065938 - Apparatus, system, and method of inspecting image, and recording medium storing image inspection control program (2015-06-23),

12. 8970931 - Image reading device employing calibration plate, apparatus including image reading device, image reading controlling method, and recording medium storing image reading control program (2015-03-03),

13. 8964249 - Image test apparatus, image test system, and image test method for testing a print image based on master image data (2015-02-24),

14. 8848244 - Image inspection method, apparatus, control program overlapping inspection images to obtain positional shift (2014-09-30),

15. 8792128 - Apparatus, system, and method of inspecting image, and recording medium storing image inspection control program (2014-07-29),

Title: Keiji Kojima: Pioneering Inventor Shaping Technological Innovation

Introduction: Keiji Kojima, a visionary inventor hailing from Sagamihara, JP, has made significant contributions to the world of technology. With a remarkable portfolio of 63 patents, his inventive spirit and commitment to problem-solving have left an indelible mark on the industry.

Latest Patents: Among his latest patents is an inspection system that uses a comparison with a master image to evaluate the quality of a target object with precision. Additionally, his head driving device, liquid discharge apparatus, and head driving method showcase his expertise in developing cutting-edge solutions for efficient operations.

Career Highlights: Keiji Kojima's illustrious career includes stints at renowned companies such as Hitachi, Ltd. and Ricoh Company, Ltd. His innovative work has garnered recognition for its ingenuity and practicality in addressing complex technological challenges.

Collaborations: Throughout his career, Keiji Kojima has collaborated with esteemed colleagues such as Kiyokazu Nishioka and Hiroyoshi Ishizaki. Together, they have pioneered advancements in various technological fields, setting new standards for innovation and excellence.

Conclusion: Keiji Kojima emerges as a trailblazing inventor whose unwavering dedication to innovation continues to inspire generations of inventors worldwide. His groundbreaking inventions and collaborative efforts have solidified his legacy as a driving force in the realm of technological advancements.