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For the Inventor, By the Inventor

Hyogo, Japan

Toa Corporation


USPTO Granted Patents = 57

% Expired Patents = 15.8



Trademarks = 4

Forward Citations = 445

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64 inventors (with patents filed for the assignee):

goldMedal Hiroshi Kubota (8 out of 18 patents)

silverMedal Daisuke Higashihara (6 out of 6 patents)

bronzeMedal Tomohisa Tanaka (6 out of 6 patents)

4.  Ken Iwayama (5 out of 7 patents)

5.  Richard Ganley (5 out of 5 patents)

6.  Tsutomu Yoshioka (4 out of 4 patents)

7.  Shuichi Okamura (4 out of 4 patents)

8.  Satoshi Miyata (3 out of 4 patents)

9.  Shin Azumi (3 out of 10 patents)

10.  Ming Chih Chang (3 out of 3 patents)

11.  Tsung Yi Lee (3 out of 3 patents)

12.  Narutoshi Okazaki (3 out of 3 patents)

13.  Koji Moriguchi (2 out of 11 patents)

14.  Takashi Nishino (2 out of 7 patents)

15.  Tomohiro Jonan (2 out of 2 patents)


Core Competencies:
Public Address System
AI Control Device
Microphone Array
Wireless Microphone System
Image Compression
Sound Source Position Estimation
Noise Eliminating Apparatus
Speaker System
Digital Communication
Resonance Frequency Detection
Transmitter and Receiver
Impulse Noise Suppression

57 patents:

1. 12273692 - Public address device, howling suppression device, and howling suppression method (2025-04-08),
2. 12266369 - AI control device, server device connected to AI control device, and AI control method (2025-04-01),
3. 12170872 - Public address system (2024-12-17),
4. 12156926 - Topical composition for nanobubble cosmetic (2024-12-03),
5. 12012836 - Water bottom resource collecting system and collecting method (2024-06-18),
6. 10355794 - Channel simulation device and channel simulation program (2019-07-16),
7. D851633 - Microphone with built-in speaker (2019-06-18),
8. 9826307 - Microphone array including at least three microphone units (2017-11-21),
9. 9818430 - Estimating sound source position with microphone array control (2017-11-14),
10. 9648413 - Loudspeaker system (2017-05-09),
11. 9565504 - Speaker device (2017-02-07),
12. 9131292 - Wireless microphone system (2015-09-08),
13. 8903118 - Diaphragm and speaker (2014-12-02),
14. D714266 - Microphone (2014-09-30),
15. D712878 - Speaker (2014-09-09),
TOA CORPORATION is a leading Japanese construction and civil engineering company. With over 130 years of experience, TOA has a strong presence in Japan and global operations in various countries. The company specializes in a wide range of construction services including building construction, infrastructure development, and maintenance. TOA is committed to delivering high-quality and sustainable solutions to its clients while contributing to the overall betterment of society.
This text is generated by artificial intelligence and may not be accurate.

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USPTO Data Jan 1 1976 - Sep 22 2026

Toa Corporation
57 Patents

#22 in Hyogo

#1,586 in Japan

#12,538 in the World

Hyogo, JP
Hyogo, Japan

Toa Corporation

Forward Citations = 445

64 inventors:

goldMedal Hiroshi Kubota (8 out of 18 patents)

silverMedal Daisuke Higashihara (6 out of 6 patents)

bronzeMedal Tomohisa Tanaka (6 out of 6 patents)

4.  Ken Iwayama (5 out of 7 patents)

5.  Richard Ganley (5 out of 5 patents)

Please report any incorrect information to [email protected]
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