Location History:
- Yamanashi, JP (1995)
- Koufu, JP (1997 - 1999)
- Yamanashi-ken, JP (2001)
Company Filing History:
3 out of 2,861 
2 out of 96 
1 out of 832,912 Years Active: 1995-2001
Title: **Innovator Spotlight: Shigenori Murakami**
Introduction
Shigenori Murakami is a prominent inventor based in Koufu, Japan. With a total of four patents to his name, he has made significant contributions to the field of optical recording technology. His inventive solutions demonstrate a commitment to advancing media storage capabilities.
Latest Patents
Two of Murakami's latest patents are noteworthy for their innovative approach to optical recording. The first, titled "Two-disc laminated optical recording medium," proposes an optical recording medium that features a substrate with annular grooves and a recording layer containing an organic coloring matter. This layer has a specific thickness providing an absorbance between 0.65 and 0.75, with information recorded using a laser beam within the wavelength range of 600 to 700 nm, utilizing an objective lens with a numerical aperture between 0.55 and 0.70.
The second patent, "Optical disk having first and second recording areas with wobble," describes a recordable optical disc capable of recording information by applying a light beam to its surface. This disc features a unique design that incorporates a first recording area and a second recording area, which operate at different linear velocities. Each area contains guide grooves with a wobble frequency lower than the EFM signal frequency band, thus enhancing its recording efficiency.
Career Highlights
Shigenori Murakami has been associated with notable companies such as Pioneer Electronic Corporation and Pioneer Video Corporation. His tenure in these organizations has allowed him to explore and develop cutting-edge technologies in the field of optical media.
Collaborations
Throughout his career, Murakami has collaborated with fellow innovators, including Toshihiko Takishita and Eiji Muramatsu. These joint efforts have contributed to the development of advanced optical recording technologies and fostered an environment of creativity and innovation.
Conclusion
With his four patents, Shigenori Murakami has established himself as a significant player in the realm of optical recording technology. His inventive contributions continue to impact the industry, highlighting the importance of innovation and collaboration in creating pioneering solutions. Murakami's work exemplifies the spirit of invention that drives technological advancement today.