Location History:
- Yokohama, JP (1987)
- Hitachinaka, JP (2002 - 2007)
- Hitachi, JP (1990 - 2010)
- Chiba, JP (2003 - 2011)
- Kumamoto, JP (2009 - 2011)
- Nagano, JP (2014 - 2017)
- Himeji, JP (2020)
- Tokyo, JP (1995 - 2022)
Company Filing History:
28 out of 42,485 
15 out of 58,129 
3 out of 24 
Years Active: 1987-2024
Title: Innovations by Hiroshi Katayama in Electromagnetic Wave Shielding
Introduction
Hiroshi Katayama is a prolific inventor based in Chiba, Japan, with an impressive portfolio of 47 patents. His work primarily focuses on creating advanced materials and solutions that provide effective shielding against electromagnetic waves, demonstrating his commitment to addressing modern technological challenges.
Latest Patents
Among his most recent contributions are several innovations related to electromagnetic wave shielding and absorbing molded articles. His first notable patent describes a molded article made from a thermoplastic resin composition mixed with carbon fibers. This invention achieves excellent shielding properties and absorbency for specific frequency electromagnetic waves, with the article exhibiting characteristics such as:
- A weighted average fiber length of carbon fibers ranging from 0.05 to 8.0 mm.
- A carbon fiber content ratio from 0.05 to 45 mass %.
- A thickness spanning from 0.01 mm to 5 mm.
- A shielding property of 10 dB or greater and an absorbency of at least 5% for frequencies between 59 GHz and 100 GHz.
The second patent outlines a similar molded article incorporating stainless steel fibers. This version boasts:
- A content ratio of stainless steel fibers from 0.5 to 20 mass %.
- A thickness between 0.5 mm and 5 mm.
- A shielding property exceeding 10 dB and an absorbency of 25% or greater for the same frequency domain.
Career Highlights
Hiroshi Katayama has contributed significantly during his tenure at renowned companies, including Hitachi, Ltd. and Sony Corporation. His experiences at these leading organizations have undoubtedly shaped his innovative approach and technical skills in materials science and engineering.
Collaborations
Throughout his career, Katayama has collaborated with talented professionals like Shigeki Morinaga and Junichi Ishii. These partnerships have likely fostered creative exchanges that have enhanced his inventive process and broadened the scope of his patents.
Conclusion
Hiroshi Katayama's contribution to the field of electromagnetic wave shielding demonstrates his significant role as an inventor dedicated to addressing contemporary challenges in technology. With a robust patent portfolio and a commitment to innovation, he continues to influence advancements in material science and engineering. His work may pave the way for future developments in shielding technologies, ensuring better safety and functionality in various applications.
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.