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Diafoil Company, Ltd.

USPTO Granted Patents = 59

Trademarks = 2

Forward Citations = 778

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53 inventors (with patents filed for the assignee):

Shigeo Utsumi (25 out of 30 patents)

Seiji Sakamoto (11 out of 18 patents)

Yujiro Fukuda (9 out of 12 patents)

4. Kichinojo Tomitaka (6 out of 6 patents)

5. Naohiro Takeda (6 out of 8 patents)

6. Yoshinori Sato (5 out of 6 patents)

7. Kazuo Endo (5 out of 17 patents)

8. Yuzo Otani (5 out of 7 patents)

9. Tomoyuki Kotani (5 out of 10 patents)

10. Yoshio Meguro (5 out of 6 patents)

11. Narihiro Masuda (4 out of 10 patents)

12. Nariaki Okajima (4 out of 5 patents)

13. Satoshi Otonari (4 out of 6 patents)

14. Chikakazu Kawaguchi (4 out of 9 patents)

15. Toshifumi Takisawa (4 out of 7 patents)

Core Competencies:

Polyester Film

Magnetic Recording Medium

Biaxially Oriented Polyester Film

Heat-Sealable Laminated Polyester Film

Polyethylene Naphthalate Film

Thermal Transfer Printing Material

Electrically Conductive Film

Data Processing Apparatus

59 patents: Sort by Forward Citations

1. 5581435 - Polyester film capacitor element (1996-12-03),

2. 5385768 - Electrically conductive film (1995-01-31),

3. 5212006 - High density magnetic recording medium (1993-05-18),

4. 5188891 - Magnetic recording medium comprising a polyester film substrate, a (1993-02-23),

5. 5164439 - Polyester film for magnetic recording media (1992-11-17),

6. 5153302 - Polyester film for capacitor (1992-10-06),

7. 5145746 - Laminating material for safety glass (1992-09-08),

8. 5106681 - Polyester films, magnetic recording media and film capacitors produced (1992-04-21),

9. 5100719 - Biaxially oriented polyester film containing multilayered cross-linked (1992-03-31),

10. 5096773 - Biaxially oriented polyester film (1992-03-17),

11. 5095332 - Data processing apparatus provided in copying machine (1992-03-10),

12. 5093064 - Low-shrinkage polyester film and preparation thereof (1992-03-03),

13. 5087526 - Biaxially oriented polyester film for use in floppy disc (1992-02-11),

14. 5082730 - Stretched polyester film having an antistatic coating comprising a (1992-01-21),

15. 5071690 - Moldable biaxially stretched polyester film (1991-12-10),

Diafoil Company, Ltd. is a leading manufacturer and supplier of specialized films and sheets. With a commitment to innovation, quality, and customer satisfaction, Diafoil provides a wide range of high-performance products for various industries including packaging, printing, electronics, and agriculture. Their advanced manufacturing facilities and stringent quality control processes ensure the delivery of reliable and sustainable solutions for diverse applications. Visit their website to explore their product offerings and learn more about their expertise.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Jan 6 2026

59 Patents

#640 in Tokyo

#1,525 in Japan

#11,959 in the World

Diafoil Company, Ltd.

Forward Citations = 778

53 inventors:

Shigeo Utsumi (25 out of 30 patents)

Seiji Sakamoto (11 out of 18 patents)

Yujiro Fukuda (9 out of 12 patents)

4. Kichinojo Tomitaka (6 out of 6 patents)

5. Naohiro Takeda (6 out of 8 patents)

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