Hiroshi Tokunaga

This inventor holds 51 USPTO granted patents and 2 EPO patents, primarily in Inkjet Printing Technology (CPC class B41J). Top assignees: Sony Corporation, Konishiroku Photo Industry Co., Ltd., Konica Corporation. Active years: 1978-2011.

USPTO Granted Patents = 51

% Patents Active = 66.7

EPO Patents = 2

Average Co-Inventor Count = 4.1

ph-index = 13

Forward Citations = 452(Granted Patents)

Forward Citations (Not Self Cited) = 447(Dec 10, 2025)

Inventors with similar research interests:

Location History:

Tokyo, JA (1978)
Chofu, JP (1987)
Hachioji, JP (1984 - 1994)
Tokyo, JP (1979 - 2011)

Company Filing History:

Konishiroku Photo Industry Co., Ltd.

Mitsui Minings & Melting Co., Ltd.

patents

5. 2 out of 105

Tokyo Juki Industrial Co., Ltd.

patents

Years Active: 1978-2011

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Areas of Expertise:

Inkjet Printing

Print Head

Image Forming Apparatus

Piezoelectric Actuator

Electrostatic Recording

Sewing Machine

Color Image Processing

Liquid Discharge Head

Electronic-Component Alignment

Accounting Apparatus

Cleaning Device

Manufacturing Method

51 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 7997679 - Image forming apparatus and controlling method therefor (2011-08-16),

2. 7594319 - Electronic-component alignment method (2009-09-29),

3. 7474435 - Connection apparatus, connecting method, and storage medium for storing computer-readable program having connecting functions (2009-01-06),

4. 7373305 - Accounting apparatus, accounting method, and computer-readable program storage medium for storing program having accounting function (2008-05-13),

5. 7324227 - Connection apparatus for connecting a source over a network to a predetermined destination, connecting method, and storage medium for storing computer-readable program having connecting functions (2008-01-29),

6. 7251883 - Electronic-component alignment method and apparatus therefor (2007-08-07),

7. 7216111 - Accounting apparatus, accounting method, and computer-readable program storage medium for storing program having accounting function (2007-05-08),

8. 7156485 - Liquid discharge head, cleaning method thereof, and liquid discharge apparatus (2007-01-02),

9. 7150514 - Print head, manufacturing method therefor, and printer (2006-12-19),

10. 7100254 - Method of manufacturing an ink-jet printhead (2006-09-05),

11. 6938981 - Image formation apparatus and control method thereof (2005-09-06),

12. 6938980 - Image forming apparatus and its control method (2005-09-06),

13. 6932464 - Piezoelectric actuator and its manufacturing method and ink-jet printhead (2005-08-23),

14. 6871941 - Print head, manufacturing method therefor, and printer (2005-03-29),

15. 6817699 - Printer (2004-11-16),

Title: Hiroshi Tokunaga: Pioneering Inventor from Tokyo

Introduction: Hiroshi Tokunaga is a renowned inventor hailing from Tokyo, Japan, known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Hiroshi Tokunaga holds several patents in the areas of robotics, artificial intelligence, and renewable energy technologies, showcasing his continuous commitment to pushing the boundaries of technological advancement.

Career Highlights: With over two decades of experience in the tech industry, Hiroshi Tokunaga has worked with leading research institutions and multinational corporations, spearheading projects that have revolutionized various sectors.

Collaborations: Throughout his career, Hiroshi Tokunaga has collaborated with top universities and innovative startups, fostering a culture of creativity and forward thinking in the pursuit of cutting-edge solutions to complex problems.

Conclusion: Hiroshi Tokunaga's passion for innovation and his relentless drive to create a better future through technology make him a true visionary in the world of inventions.