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Fujitsu Isotec Limited

USPTO Granted Patents = 26

% Expired Patents = 3.8

Forward Citations = 409

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54 inventors (with patents filed for the assignee):

Chiaki Sekioka (7 out of 9 patents)

Masayuki Kubota (6 out of 8 patents)

Yukio Saito (6 out of 6 patents)

4. Hisashi Uemura (5 out of 6 patents)

5. Masaki Okuyama (5 out of 5 patents)

6. Masaru Sugie (4 out of 11 patents)

7. Takumi Kawamura (4 out of 13 patents)

8. Hiromichi Suzawa (4 out of 4 patents)

9. Minako Sato (4 out of 4 patents)

10. Tomoyuki Nagamine (4 out of 4 patents)

11. Norihiro Yoshida (3 out of 4 patents)

12. Kohichi Yoshida (3 out of 3 patents)

13. Masayuki Tanaka (3 out of 3 patents)

14. Masahiro Ono (2 out of 9 patents)

15. Akio Yano (2 out of 13 patents)

Core Competencies:

Latent Image Printing

Ink Composition

Paper Feeder

Inkjet Printer

Piezoelectric Pump

Image Forming Apparatus

Ink Ribbon Cassette

Skew Correction

Magnetic Retaining Device

Font Packing Device

Grounding Structure

Portable Printer

26 patents: Sort by Forward Citations

1. 6899752 - Latent image printing ink composition, prints containing latent images recorded with the ink composition, and latent image data-based deciphering method and latent image data deciphering device (2005-05-31),

2. 6152628 - Sheet supply apparatus with feed protrusions for skew correction (2000-11-28),

3. 6135384 - Device for detecting near end state of roll of paper (2000-10-24),

4. 6102595 - Sheet supply apparatus having inclined feeding correcting function and (2000-08-15),

5. 6071352 - Erasing method and erasing apparatus for performing that erasing method (2000-06-06),

6. 6030440 - Water-based pigment-type ink and ink jet printer (2000-02-29),

7. 6024322 - Device for detecting near end state of roll of paper (2000-02-15),

8. 6007189 - Piezoelectric type ink-jet printing head having a pressure chamber plate (1999-12-28),

9. 5906481 - Piezoelectric fluid pump (1999-05-25),

10. 5822504 - Font packing device and font unpacking device (1998-10-13),

11. 5531431 - Paper feeder for portable printer (1996-07-02),

12. 5530528 - Image forming apparatus having contact type, one-component developing (1996-06-25),

13. D369180 - Printer (1996-04-23),

14. 5472286 - Ink ribbon cassette (1995-12-05),

15. 5438391 - Clamshell-type image forming apparatus (1995-08-01),

Company Overview

Fujitsu Isotec Limited, based in Tokyo, specializes in advanced information technology solutions, focusing on security and data management. The company develops innovative products and services that enhance data integrity and protection, catering to various sectors including finance, healthcare, and public services. With a commitment to research and development, Fujitsu Isotec plays a crucial role in the evolution of secure IT infrastructure, leveraging cutting-edge technologies to meet the demands of a rapidly changing digital landscape.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

26 Patents

#1,164 in Tokyo

#2,507 in Japan

#24,806 in the World

Fujitsu Isotec Limited

Forward Citations = 409

54 inventors:

Chiaki Sekioka (7 out of 9 patents)

Masayuki Kubota (6 out of 8 patents)

Yukio Saito (6 out of 6 patents)

4. Hisashi Uemura (5 out of 6 patents)

5. Masaki Okuyama (5 out of 5 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Fujitsu Isotec Limited. Retrieved from https://idiyas.com/company/fujitsu-isotec

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

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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