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For the Inventor, By the Inventor

Hyogo, Japan

Toa Corporation


USPTO Granted Patents = 58

% Expired Patents = 15.5



Trademarks = 4

Forward Citations = 445

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65 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.  Ikuo Sawada (2 out of 7 patents)

15.  Masanori Kyo (2 out of 5 patents)


Core Competencies:
Public Address Device
AI Control Device
Microphone Array
Wireless Microphone
Speaker System
Image Compression
Sound Source Position
Noise Eliminating Apparatus
Loudspeaker System
Digital Broadcast
Impulse Noise Suppression
Resonance Frequency

58 patents:

1. 12760646 - Water bottom resource collecting method (2026-10-13),
2. 12273692 - Public address device, howling suppression device, and howling suppression method (2025-04-08),
3. 12266369 - AI control device, server device connected to AI control device, and AI control method (2025-04-01),
4. 12170872 - Public address system (2024-12-17),
5. 12156926 - Topical composition for nanobubble cosmetic (2024-12-03),
6. 12012836 - Water bottom resource collecting system and collecting method (2024-06-18),
7. 10355794 - Channel simulation device and channel simulation program (2019-07-16),
8. D851633 - Microphone with built-in speaker (2019-06-18),
9. 9826307 - Microphone array including at least three microphone units (2017-11-21),
10. 9818430 - Estimating sound source position with microphone array control (2017-11-14),
11. 9648413 - Loudspeaker system (2017-05-09),
12. 9565504 - Speaker device (2017-02-07),
13. 9131292 - Wireless microphone system (2015-09-08),
14. 8903118 - Diaphragm and speaker (2014-12-02),
15. D714266 - Microphone (2014-09-30),
Company Overview
Toa Corporation, headquartered in Hyogo, Japan, is a leader in audio technology, specializing in the development and manufacturing of advanced public address systems and audio equipment. The company focuses on innovative solutions such as AI-controlled devices, microphone arrays, wireless microphone systems, and speaker systems. Additionally, Toa is engaged in research related to image compression, sound source positioning, and noise elimination technologies, contributing to enhanced communication and sound quality across various environments.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

Toa Corporation USPTO Patent Assignee Logo
58 Patents

#22 in Hyogo

#1,572 in Japan

#12,395 in the World

Hyogo, JP
Hyogo, Japan

Toa Corporation

Forward Citations = 445

65 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)

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

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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