This inventor holds 73 USPTO granted patents and 3 published patent applications and 24 EPO patents, primarily in Wireless Circuit Design (CPC class H01P). Top assignees: Ntt Docomo, Inc., Ntt Mobile Communications Network, Inc., Nippon Telegraph and Telephone Corporation. Active years: 1992-2016.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Inventors with similar research interests:
Location History:
- Yokusuka, JP (1998)
- Yokosuka, JP (1994 - 2005)
- Kanagawa, JP (2009 - 2013)
- Yokohama, JP (1992 - 2015)
- Tokyo, JP (2016)
Company Filing History:
67 out of 4,938 
5 out of 247 
2 out of 5,300 
Years Active: 1992-2016
Areas of Expertise:
Title: Innovations and Contributions of Shoichi Narahashi
Introduction: Shoichi Narahashi, based in Yokohama, Japan, has made significant contributions to the field of wireless communication technology. With an impressive portfolio of 73 patents, Narahashi's work focuses primarily on enhancing the frequency management capabilities of wireless circuits, ensuring efficient communication across multiple frequency bands.
Latest Patents: Among Narahashi’s latest inventions are groundbreaking patents that showcase his expertise in wireless circuitry. One such patent is the "Wireless Circuit and Frequency Pair Determination Method." This innovation allows a wireless circuit to effectively operate across various frequency bands, even when using current variable frequency filters in the duplexer. The circuit is composed of a transmission-reception antenna, a variable frequency duplexer, a double-pole six-throw switch, an RFIC, and a controller that manages switching operations based on control signals. The RFIC innovatively determines the frequency band pairs for incoming and outgoing signals, facilitating optimal performance in wireless communications.
Another notable patent is the "Front-end Circuit and Impedance Adjustment Method," which details a front-end circuit comprising an RFIC, an antenna, multiple duplexers, and variable impedance adjustment circuits. The control unit, in conjunction with the RFIC, executes switching operations to improve input impedance, significantly enhancing performance across different frequency bands.
Career Highlights: Narahashi has shown remarkable talent throughout his career, particularly during his tenure at prominent companies such as NTT Docomo, Inc. and NTT Mobile Communications Network, Inc. His work in these leading telecommunications firms has positioned him as a key innovator in the development of advanced wireless technologies.
Collaborations: Throughout his career, Narahashi has collaborated with various talented individuals, including esteemed colleagues Hiroshi Okazaki and Kunihiro Kawai. Together, they have contributed to the creation of cutting-edge technologies that continue to shape the wireless communication landscape.
Conclusion: Shoichi Narahashi's innovative spirit and relentless pursuit of advancement in wireless communication have led to significant developments in the industry. His extensive patent portfolio not only reflects his expertise but also his commitment to pushing the boundaries of technology. Narahashi’s work serves as an inspiration for future inventors and reinforces the importance of continuous innovation in the telecommunications sector.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile