Location History:
- Kanagawa, JP (1987)
- Yokohama, JP (1988)
- Chiba-ken, JP (1996)
- Kashiwa, JP (1997 - 1999)
- Shonan-machi, JP (2001)
- Higashi Katsushika-gun, JP (2006 - 2007)
- Matsudo, JP (2006 - 2007)
- Chiba, JP (1991 - 2009)
Company Filing History:
17 out of 149 
5 out of 13,395 
4 out of 19,697 
Years Active: 1987-2009
Title: The Innovative Contributions of Kei Ishii
Introduction
Kei Ishii is a prominent inventor based in Matsudo, Japan, known for his significant contributions to the field of materials engineering. With a total of 18 patents to his name, Ishii has made remarkable advancements in the design and production of sintered components, particularly in the automotive and machinery sectors.
Latest Patents
Among his latest patents, Ishii has developed a sintered gear that is composed of a sintered alloy featuring a metal matrix and pores. This innovative gear includes a densified layer on the tooth surface and bottom land, which reduces porosity to 10% or less. The thickness of the densified layer at the tooth surface ranges from 300 to 1,000 microns, while the bottom land has a thickness of 10 to 300 microns. The continuous boundary surface of the densified layer ensures a smooth transition from the tooth surface to the bottom land. Additionally, he has patented a sintered sprocket for silent chains, which is produced from a material with minimal addition elements through a simple densifying method. This sprocket is made from a ferrous material with specific composition requirements and exhibits high density and hardness, making it suitable for demanding applications.
Career Highlights
Throughout his career, Kei Ishii has worked with notable companies such as Hitachi Powdered Metals Co., Ltd. and Nissan Motor Company Limited.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.