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Yozan Corporation

USPTO Granted Patents = 159

Forward Citations = 1,686

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43 inventors (with patents filed for the assignee):

Makoto Yamamoto (119 out of 155 patents)

Sunao Takatori (111 out of 126 patents)

Guoliang Shou (101 out of 105 patents)

4. Changming Zhou (42 out of 47 patents)

5. Weikang Yang (28 out of 30 patents)

6. Kazunori Motohashi (19 out of 20 patents)

7. Xuping Zhou (15 out of 20 patents)

8. Ryohei Kumagai (12 out of 51 patents)

9. Koji Matsumoto (10 out of 120 patents)

10. Mamoru Sawahashi (8 out of 304 patents)

11. Kunihiko Suzuki (8 out of 10 patents)

12. Fumiyuki Adachi (8 out of 50 patents)

13. Takashi Tomatsu (7 out of 7 patents)

14. Kenzo Urabe (5 out of 20 patents)

15. Wiwat Wongwarawipat (5 out of 5 patents)

Core Competencies:

Spread Spectrum

Matched Filter

CDMA

Signal Processing

Analog to Digital Converter

Communication System

Phase Correction

Demodulator

Computational Circuit

Filter Circuit

Capacitance Forming

Receiver Apparatus

159 patents: Sort by Forward Citations

1. 6778654 - System for transfer control of telephone line (2004-08-17),

2. 6763231 - Radio communication device, parent communication device, parent-child communication device and radio communication system (2004-07-13),

3. 6625205 - Matched filter circuit (2003-09-23),

4. 6563373 - Filter circuit utilizing a plurality of sampling and holding circuits (2003-05-13),

5. 6512785 - Matched filter bank (2003-01-28),

6. 6421027 - Millimeter-wave signal transmission system communicatable within buildings (2002-07-16),

7. 6389438 - Matched filter and signal reception apparatus (2002-05-14),

8. 6388583 - Method and circuit for codes generation (2002-05-14),

9. 6370130 - Spread spectrum communication system (2002-04-09),

10. 6340942 - Analog to digital converter (2002-01-22),

11. 6300823 - Filter circuit (2001-10-09),

12. 6281831 - Analog to digital converter (2001-08-28),

13. 6263012 - Receiver apparatus for CDMA communication system (2001-07-17),

14. 6252899 - Complex despreading system (2001-06-26),

15. 6169771 - Matched filter for spread spectrum communication systems and hybrid analog-digital transversal filter (2001-01-02),

Company Overview

Yozan Corporation, based in Tokyo, specializes in advanced communication technologies, focusing on spread spectrum communication systems. The company is recognized for its expertise in areas such as matched filtering, CDMA, and signal processing, which are essential for enhancing the performance and reliability of communication networks. Yozan's innovations also encompass analog to digital conversion, phase correction, and demodulation techniques, positioning it as a key player in the development of sophisticated communication solutions.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

159 Patents

#413 in Tokyo

#824 in Japan

#5,173 in the World

Yozan Corporation

Forward Citations = 1,686

43 inventors:

Makoto Yamamoto (119 out of 155 patents)

Sunao Takatori (111 out of 126 patents)

Guoliang Shou (101 out of 105 patents)

4. Changming Zhou (42 out of 47 patents)

5. Weikang Yang (28 out of 30 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Yozan Corporation. Retrieved from https://idiyas.com/company/yozan

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

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