Masakazu Iwasa

This inventor holds 13 USPTO granted patents. Top assignees: Fuji Photo Film Company, Limited, Sumitomo Bakelite Company Limited. Active years: 1976-1991.

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

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

USPTO Granted Patents = 13

% Patents Active = 100.0

Average Co-Inventor Count = 2.6

ph-index = 6

Forward Citations = 110(Granted Patents)

Location History:

Tokyo, J (1976)
Tokyo, JA (1978)
Tokyo, JP (1979 - 1981)
Odawara, JP (1982 - 1989)
Kanagawa, JP (1987 - 1991)

Company Filing History:

13 out of 16,458

Fuji Photo Film Company, Limited

patents

1 out of 615

Sumitomo Bakelite Company Limited

patents

where one patent can have more than one assignee

Years Active: 1976-1991

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13 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5022519 - Flexible disk jacket (1991-06-11),

2. 4864451 - Flexible disk jacket (1989-09-05),

3. 4807078 - Flexible disk jacket colored within specific munsell ranges (1989-02-21),

4. 4670314 - Colored jacket for floppy disk (1987-06-02),

5. 4393112 - Transfer powder marking method using a core-shell powder comprising a (1983-07-12),

6. 4320408 - Method of forming electrostatic image (1982-03-16),

7. 4297384 - Method of developing electrostatic latent image (1981-10-27),

8. 4281622 - Apparatus for developing electrostatic latent image (1981-08-04),

9. 4192232 - Electrostatic image recording method and apparatus therefor (1980-03-11),

10. 4187774 - Electrostatic print marking apparatus (1980-02-12),

11. 4144808 - Electrophotographic marking apparatus (1979-03-20),

12. 4075011 - Electrostatic powder coating method (1978-02-21),

13. 3998634 - Powder electrophotographic method (1976-12-21),

Title: Masakazu Iwasa: Innovator in Flexible Disk Technology

Introduction

Masakazu Iwasa is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of flexible disk technology, holding a total of 13 patents. His innovative designs have played a crucial role in the development of storage media.

Latest Patents

One of Iwasa's latest patents is the flexible disk jacket. This invention is designed to accommodate a disk-like magnetic recording medium, forming a flexible disk. The jacket is created by folding and bonding a plastic sheet into a bag-like shape. The plastic sheet is made from a composite material, which consists of an outer layer and an inner layer, each containing at least one plastic layer. The outer layer is colored and possesses heat sealability and heat resistance, while the inner layer has heat sealability and antistatic properties.

Career Highlights

Iwasa has worked with notable companies such as Fuji Photo Film Company, Limited and Sumitomo Bakelite Company Limited. His experience in these organizations has contributed to his expertise in the field of materials and technology.

Collaborations

Some of his coworkers include Hisashi Kato and Yoshio Kudo. Their collaboration has likely fostered an environment of innovation and creativity in their projects.

Conclusion

Masakazu Iwasa's contributions to flexible disk technology and his impressive portfolio of patents highlight his role as a key innovator in the industry. His work continues to influence advancements in storage media.

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]