logo

For the Inventor, By the Inventor

JP

Seikosha Co., Ltd.

Calculating rank
USPTO Granted Patents = 696

Forward Citations = 5,172

Loading Chart...
Loading Chart...

310 inventors (with patents filed for the assignee):

goldMedal Ryoichi Kaneko (61 out of 65 patents)

silverMedal Hisako Sugano (35 out of 57 patents)

bronzeMedal Mitsuo Wada (26 out of 26 patents)

4.  Sakae Tanaka (25 out of 33 patents)

5.  Yoichi Seki (24 out of 51 patents)

6.  Asao Takashima (22 out of 22 patents)

7.  Yoshiaki Watanabe (21 out of 83 patents)

8.  Masahiro Aikawa (21 out of 21 patents)

9.  Akio Tajima (19 out of 91 patents)

10.  Seiji Odaka (19 out of 21 patents)

11.  Mikio Hayashi (17 out of 29 patents)

12.  Hajime Oda (16 out of 40 patents)

13.  Masanori Fujita (15 out of 50 patents)

14.  Kazuo Akimoto (15 out of 25 patents)

15.  Shigeru Tagami (15 out of 16 patents)


Core Competencies:
Clock
Wristwatch
Distance Measuring Device
Printing Method
Alarm System
Ink Jet Head
Time Recorder
Light-Emitting Element
Travel Alarm Clock
Electrostatic Capacitance Sensor
Motor Driven Shutter
Watch Dial

696 patents:

1. D488071 - Clock (2004-04-07),
2. 5814751 - Musical tone generating apparatus (1998-09-29),
3. 5667351 - Positioning and clamping device of a board (1997-09-16),
4. D379596 - Clock (1997-06-03),
5. 5614984 - Distance measuring device (1997-03-25),
6. D378497 - Clock (1997-03-18),
7. D377608 - Clock (1997-01-28),
8. 5559569 - Motor driven shutter having focus adjusting and stop setting means (1996-09-24),
9. 5554973 - Electrostatic capacitance-type sensor (1996-09-10),
10. 5547292 - Printing apparatus (1996-08-20),
11. D371572 - Date/time stamper (1996-07-09),
12. 5535308 - Printing method for use with dot printer (1996-07-09),
13. 5534903 - Ink jet head (1996-07-09),
14. D370935 - Date/time stamper (1996-06-18),
15. D370853 - Travel alarm clock (1996-06-18),
Company Overview
Seikosha Co., Ltd. is a prominent Japanese company specializing in timepiece technology, focusing on the development and manufacturing of various timekeeping devices. The company is known for its expertise in creating clocks, wristwatches, and advanced distance measuring devices. Additionally, Seikosha innovates in printing methods, alarm systems, and ink jet heads, contributing to the evolution of time recording and light-emitting elements. With a commitment to precision and quality, Seikosha plays a significant role in the horological industry.
Profile summary synthesized from public USPTO records and patent filings.

logo

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

Seikosha Co., Ltd. USPTO Patent Assignee Logo
696 Patents

#2 in

#299 in Japan

#1,438 in the World

JP
JP

Seikosha Co., Ltd.

Forward Citations = 5,172

310 inventors:

goldMedal Ryoichi Kaneko (61 out of 65 patents)

silverMedal Hisako Sugano (35 out of 57 patents)

bronzeMedal Mitsuo Wada (26 out of 26 patents)

4.  Sakae Tanaka (25 out of 33 patents)

5.  Yoichi Seki (24 out of 51 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Seikosha Co., Ltd.. Retrieved from https://idiyas.com/company/seikosha-company

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]
Loading…