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Nabco Limited

USPTO Granted Patents = 60

% Expired Patents = 23.3

EPO Patents = 3

Trademarks = 3

Forward Citations = 942

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74 inventors (with patents filed for the assignee):

Osamu Akamatsu (5 out of 17 patents)

Masahiko Okuda (4 out of 13 patents)

Norio Shiraishi (4 out of 4 patents)

4. Yasukazu Furuichi (4 out of 4 patents)

5. Yoshinobu Ishida (4 out of 4 patents)

6. Hisayuki Kanki (3 out of 5 patents)

7. Yoshio Asano (3 out of 12 patents)

8. Kim W King (3 out of 3 patents)

9. Kensuke Ioku (3 out of 8 patents)

10. Masahiro Tsunemi (3 out of 4 patents)

11. Takeshi Hachimaki (3 out of 3 patents)

12. Koji Tsutsumi (3 out of 3 patents)

13. Toshiyuki Matsuoka (3 out of 3 patents)

14. Takeshi Kaneko (3 out of 3 patents)

15. Isao Kikutani (3 out of 3 patents)

Core Competencies:

Automatic Door System

Fluid Pressure Control

Prosthetic Limb

Object Sensor

Hydraulic Circuit

Brake Monitoring

Electric Vehicle

Sealed Containment Vessel

Clutch Actuating Device

Pulsation Dampening

Reduction Gear

Hollow Fiber Membrane

60 patents: Sort by Forward Citations

1. 7765910 - Sealed upscale total containment vessel (2010-08-03),

2. 7588604 - Prosthetic leg with knee braking function (2009-09-15),

3. 7506568 - Sealed upscale total containment vessel (2009-03-24),

4. 7361118 - Gear mechanism and reduction planetary gear (2008-04-22),

5. 7181369 - Method and system for administering automatic door apparatus, and automatic door apparatus (2007-02-20),

6. 7104008 - Door system with a pair of door panels connected by a swivel panel that swings back and forth for selectively opening and closing gateways in a compartment (2006-09-12),

7. 7064666 - Composite sensor for door (2006-06-20),

8. 7063200 - Pulsation dampening apparatus and clutch master cylinder (2006-06-20),

9. 7059237 - Multiple-directional switching valve (2006-06-13),

10. 7032378 - Flow divider system and valve device of the same (2006-04-25),

11. 6973784 - Hydraulic master cylinder (2005-12-13),

12. 6923109 - Mounting mechanism for a push rod of a master cylinder (2005-08-02),

13. 6840340 - Electric-powered vehicle (2005-01-11),

14. 6799424 - Hydraulic circuit (2004-10-05),

15. 6678999 - Object sensing system for use with automatic swing door (2004-01-20),

Company Overview

Nabco Limited, headquartered in Kobe, Japan, specializes in the development and manufacturing of advanced automatic door systems. The company focuses on innovative technologies that enhance accessibility and safety in various environments. Its expertise extends to fluid pressure control systems, hydraulic circuits, and object sensors, which are integral to the functionality of its automatic doors. Additionally, Nabco is involved in research related to prosthetic limbs, brake monitoring systems, and sealed containment vessels, contributing to advancements in both automotive and medical technology.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

60 Patents

#18 in Kobe

#1,534 in Japan

#12,094 in the World

Nabco Limited

Forward Citations = 942

74 inventors:

Osamu Akamatsu (5 out of 17 patents)

Masahiko Okuda (4 out of 13 patents)

Norio Shiraishi (4 out of 4 patents)

4. Yasukazu Furuichi (4 out of 4 patents)

5. Yoshinobu Ishida (4 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Nabco Limited. Retrieved from https://idiyas.com/company/nabco

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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