Location History:
- Chiba-shi, Chiba, JP (1989)
- Chiba, JP (1994 - 2003)
- Tokyo, JP (2006)
Company Filing History:
10 out of 1,256 
1 out of 2 
1 out of 116 
Years Active: 1989-2006
Title: Kyoko Hamahara: Innovator in Coated Steel Technology
Introduction
Kyoko Hamahara is a prominent inventor based in Chiba, Japan, known for her significant contributions to the field of coated steel technology. With a total of 12 patents to her name, she has made remarkable advancements that enhance the performance and durability of coated steel sheets.
Latest Patents
One of her latest patents is titled "Coated steel sheet provided with electrodeposition painting having superior appearance." This invention features a coated steel sheet composed of a steel sheet and at least two types of coating layers, which are enhanced by an electrodeposition painting that boasts superior appearance. The coated steel sheet has an arithmetic mean roughness Ra, defined by JIS B 0601-, ranging from about 0.7 to about 1.5 µm, and a peak per inch (PPI) of approximately 180 to 250. Another notable patent is "Surface treated steel sheet and method for production thereof." This invention includes a zinc phosphate coating containing magnesium on the surface of a galvanized steel sheet, along with an orthophosphoric acid ester-containing coating. This design ensures that the coated steel sheet maintains its integrity during chemical conversion treatment steps in automobile production lines, exhibiting excellent perforative corrosion resistance, whether unpainted or after electrodeposition painting.
Career Highlights
Kyoko Hamahara has worked with esteemed companies such as Kawasaki Steel Corporation and Kawasaki Steel Metal Products & Engineering Inc. Her experience in these organizations has allowed her to develop innovative solutions that address industry challenges.
Collaborations
Throughout her career, she has collaborated with notable colleagues, including Kazuo Mochizuki and Hisatada Nakakoji. These partnerships have contributed to her success and the advancement of coated steel technologies.
Conclusion
Kyoko Hamahara's work in the field of coated steel technology has led to significant innovations that improve the quality and durability of steel products. Her contributions continue to influence the industry and inspire future advancements.