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Seiko Clock Inc.

USPTO Granted Patents = 29

% Expired Patents = 17.2

Trademarks = 1

Forward Citations = 118

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20 inventors (with patents filed for the assignee):

Toyonori Muraji (8 out of 10 patents)

Motohiro Tako (4 out of 4 patents)

Koji Baba (4 out of 4 patents)

4. Hiroshi Takematsu (3 out of 3 patents)

5. Hiroyuki Hashizume (3 out of 3 patents)

6. Katsumi Shimamura (3 out of 15 patents)

7. Miyuki Imamura (2 out of 4 patents)

8. Takayuki Kanaizumi (2 out of 2 patents)

9. Satoru Stephen Yamauchi (2 out of 14 patents)

10. Shigeru Kohata (2 out of 3 patents)

11. Masanao Yokoyama (2 out of 2 patents)

12. Keiko Yoshida (2 out of 2 patents)

13. Seiji Odaka (2 out of 21 patents)

14. Shinichi Miyamoto (1 out of 53 patents)

15. Masafumi Yamamoto (1 out of 25 patents)

Core Competencies:

Radio Clock

Timepiece

Clockwork Mechanism

Decorative Body

Pendulum Device

Electroluminescent Indicator

Movable Ornamental Body

Viscous Coupling Gear

Rotary Decoration

Clock Movement

Timepiece Movement

Wall-Mounted Device

29 patents: Sort by Forward Citations

1. 9280142 - Radio clock (2016-03-08),

2. 9244435 - Timepiece having a wide variety of appearances (2016-01-26),

3. 9217993 - Timepiece with a wide variety of appearances (2015-12-22),

4. 9213315 - Timepiece with movable ornamental body (2015-12-15),

5. 9176477 - Timepiece (2015-11-03),

6. 9069334 - Radio clock (2015-06-30),

7. D680135 - Gear pump (2013-04-16),

8. 8339902 - Clockwork mechanism and clockwork timepiece (2012-12-25),

9. 8245995 - Wall-mounted device and timepiece with the same (2012-08-21),

10. D631438 - Portion of geared motor (2011-01-25),

11. 7564742 - Timepiece having openable and closeable dial plate (2009-07-21),

12. 7480213 - Timepiece (2009-01-20),

13. 7477574 - Decorative body driving mechanism (2009-01-13),

14. 7339855 - Timepiece (2008-03-04),

15. 5999495 - Timepiece movement (1999-12-07),

Company Overview

Seiko Clock Inc., headquartered in Tokyo, Japan, is renowned for its expertise in the design and manufacture of timekeeping devices. The company specializes in a diverse range of products, including quartz and mechanical watches, clocks, and other precision instruments. Seiko is committed to innovation in horology, integrating advanced technology and craftsmanship to enhance the accuracy and functionality of its timepieces. With a strong emphasis on quality and design, Seiko continues to influence the global watch industry while maintaining its rich heritage.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

29 Patents

#1,087 in Tokyo

#2,359 in Japan

#22,552 in the World

Seiko Clock Inc.

Forward Citations = 118

20 inventors:

Toyonori Muraji (8 out of 10 patents)

Motohiro Tako (4 out of 4 patents)

Koji Baba (4 out of 4 patents)

4. Hiroshi Takematsu (3 out of 3 patents)

5. Hiroyuki Hashizume (3 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Seiko Clock Inc.. Retrieved from https://idiyas.com/company/seiko-clock

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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