Masaki Ichihara

This inventor holds 64 USPTO granted patents, plus 3 CIPO patents and 5 EPO patents, primarily in Mobile Communication Systems (CPC class 375 ). Top assignees: Nec Corporation, Lenovo Innovations Limited (Hong Kong), Nippon Electric Co., Ltd.. Active years: 1985-2015.

USPTO Granted Patents = 64

% Patents Active = 79.7

CIPO Patents = 3 (Patent Applications = 3)

EPO Patents = 5

Average Co-Inventor Count = 1.1

ph-index = 17

Forward Citations = 926(Granted Patents)

Forward Citations (Not Self Cited) = 924(Dec 10, 2025)

Inventors with similar research interests:

Location History:

Minato-ku, JP (2003 - 2010)
Tokyo, JP (1985 - 2015)

Company Filing History:

Lenovo Innovations Limited (Hong Kong)

patents

1 out of 1,038

Nippon Electric Co., Ltd.

patents

Years Active: 1985-2015

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Areas of Expertise:

Distortion Control

OFDM Receiving Device

Diversity Receiver

Multi-Band Wireless Transceiver

CDMA Terminal

Baseband Circuit

Frequency Correction

Amplitude Deviation

Transmission Power Control

Direct Conversion Receiver

Variable Directional Antenna

Signal Communication Device

64 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 8995565 - Distortion control device and method (2015-03-31),

2. 8620274 - Server, mobile communication system, and data updating method in the same (2013-12-31),

3. 8396176 - OFDM receiving device and OFDM receiving method (2013-03-12),

4. 8335153 - Orthogonal frequency division multiplex modem circuit (2012-12-18),

5. 8050367 - Receiving amplitude correction circuit, receiving amplitude correction method, and receiver using the same (2011-11-01),

6. 7856216 - Diversity receiver and gain adjusting method therefor (2010-12-21),

7. 7843803 - Orthogonal frequency division multiplex modem circuit (2010-11-30),

8. 7664475 - Multi-band wireless transceiver and method of controlling the same (2010-02-16),

9. RE40553 - Method and apparatus for adjusting transmission power of CDMA terminal (2008-10-27),

10. 7330729 - Mobile terminal device and positional information system (2008-02-12),

11. 7257178 - Base band circuit of receiver and low cut-off frequency control method (2007-08-14),

12. 7228117 - Frequency correction method and apparatus for correcting secular change (2007-06-05),

13. 7206360 - Amplitude deviation correction circuit (2007-04-17),

14. 7127224 - Baseband circuit incorporated in direct conversion receiver free from direct-current offset voltage without change of cut-off frequency (2006-10-24),

15. 7099268 - Orthogonal frequency division multiplex modem circuit (2006-08-29),

Title: **Masaki Ichihara: A Pioneer in Mobile Communication Innovations**

Introduction

Masaki Ichihara, a prominent inventor based in Tokyo, Japan, has significantly contributed to the field of mobile communications and signal processing. With an impressive portfolio of 64 patents, he has been at the forefront of technological advancements that enhance mobile communication systems.

Latest Patents

Ichihara's latest innovations include a "Distortion Control Device and Method." This invention features a waveform analyzing mechanism designed to estimate the back-off value necessary for power amplifiers, which amplify high-frequency signals from baseband inputs. By analyzing the waveform without the need for pre-calculated tables, this method effectively manages channels, especially in multiplexed environments, subsequently minimizing adjacent channel leakage power.

Another notable patent is the "Server, Mobile Communication System, and Data Updating Method." This mobile communication system integrates a server, a cellular phone, and a computer, facilitating seamless data communication. Users can update and download essential data between their computer and cellular phone, improving the overall efficiency of mobile data usage.

Career Highlights

Ichihara's career spans significant roles at major companies, including NEC Corporation and Nippon Electric Co., Ltd., where he honed his expertise in mobile communication technologies. His inventive spirit has led to the development of essential tools that enhance how devices communicate wirelessly.

Collaborations

Throughout his career, Ichihara has collaborated with notable colleagues, including Yukitsuna Furuya and Shigeo Yoshihara. These partnerships have fostered a creative environment that has propelled innovation in their projects and patents.

Conclusion

Masaki Ichihara continues to be a key figure in the realm of inventions, focusing on pioneering solutions that advance mobile communication systems. His contributions through numerous patents are a testament to his dedication to innovation and his influence on the industry. As technology continues to evolve, his work remains vital in shaping the future of mobile communications.