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For the Inventor, By the Inventor

Tokyo, Japan

Masakazu Muranaka

This inventor holds 14 USPTO granted patents and 1 EPO patent. Top assignee: Ricoh Company, Ltd.. Active years: 1977-2008.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masakazu Muranaka. Retrieved from https://idiyas.com/inventor/masakazu-muranaka

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

USPTO Granted Patents = 14

% Patents Active = 92.9


Average Co-Inventor Count = 1.5

ph-index = 8

Forward Citations = 185(Granted Patents)


Location History:

  • Tokyo, JA (1977)
  • Tokyo, JP (1986 - 2008)

Company Filing History:

goldMedal14 out of 28,940 
 
Ricoh Company, Ltd.
 patents

Years Active: 1977-2008

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14 patents (USPTO):Explore Patents
1. 7377627 - Ink cartridge, housing therefor, ink bag, ink-jet recording apparatus, ink container, and image-forming apparatus (2008-05-27),
2. 7287843 - Ink bag, ink cartridge and ink-jet recording apparatus, ink filling method, ink refilling method, manufacturing method of ink cartridge, and recycling method of ink cartridge (2007-10-30),
3. D551288 - Ink pouch for a printer ink cartridge (2007-09-18),
4. D546876 - Ink pouch for a printer ink cartridge (2007-07-17),
5. D544909 - Ink pouch for a printer ink cartridge (2007-06-19),
6. D509242 - Ink pouch for a printer ink cartridge (2005-09-06),
7. 6681096 - Image formation apparatus, printer, copying machine, and facsimile device (2004-01-20),
8. 6345170 - Image forming apparatus for single-sided operation including a reversing device (2002-02-05),
9. D431259 - Toner cartridge (2000-09-26),
10. 6004052 - Printing device with a heater provided at a charge applying station (1999-12-21),
11. 5708938 - Wet process image forming apparatus and carrier vapor collecting device (1998-01-13),
12. 5434597 - Thermal transfer recorder (1995-07-18),
13. 4568949 - Thermal transfer printer with improved adhesion of colored material (1986-02-04),
14. 4057256 - Apparatus for detachably mounting a record sheet in place in a sheet (1977-11-08),

Title: The Innovative Contributions of Masakazu Muranaka

Introduction

Masakazu Muranaka is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of ink technology, particularly in the development of ink cartridges and related apparatuses. With a total of 14 patents to his name, Muranaka's work has had a substantial impact on the printing industry.

Latest Patents

Muranaka's latest patents include a variety of innovative products such as an ink cartridge, housing therefor, ink bag, ink-jet recording apparatus, ink container, and image-forming apparatus. The ink cartridge he developed features an ink containing part and first through third housings. The ink containing part includes a holding member with an ink supply opening part and a sealed ink filling opening part. The first housing holds the holding member, while the second housing has an outline analogous to that of the first housing. The third housing is designed to fit the side of the assembly from which ink is supplied. This design allows for easy assembly and disassembly of the cartridge. Additionally, his work on the ink bag includes a flexible bag body with a holding member that facilitates both ink filling and discharging.

Career Highlights

Muranaka is currently employed at Ricoh Company, Ltd., where he continues to innovate in the field of printing technology. His career has been marked by a commitment to enhancing the efficiency and functionality of ink-related products. His inventions have not only improved the user experience but have also contributed to the sustainability of ink cartridge systems.

Collaborations

Throughout his career, Muranaka has collaborated with notable colleagues such as Takashi Seto and Yasushi Nakazato. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies in the printing sector.

Conclusion

Masakazu Muranaka's contributions to ink technology exemplify the spirit of innovation. His patents and ongoing work at Ricoh Company, Ltd. continue to shape the future of printing solutions. His dedication to improving ink cartridge systems highlights the importance of innovation in everyday technology.

Profile summary based on public USPTO records.
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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