Tsuyoshi Nakano

This inventor holds 16 USPTO granted patents and 3 published patent applications, plus 6 CIPO patents and 2 EPO patents, primarily in Electric Shaver Technology. Top assignees: Izumi Products Company, G-C Dental Industrial Corp., Izumi Seimitsu Kogyo Kabushiki Kaisha. Active years: 1985-2010.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tsuyoshi Nakano. Retrieved from https://idiyas.com/inventor/tsuyoshi-nakano-7gost8v0

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank

USPTO Granted Patents = 16 (Patent Applications = 3)

% Patents Active = 62.5

CIPO Patents = 6 (Patent Applications = 4)

EPO Patents = 2

Average Co-Inventor Count = 1.4

ph-index = 7

Forward Citations = 113(Granted Patents)

Location History:

Chiba, JP (1985 - 1988)
Nagano, JP (1995)
Matsumoto, JP (1989 - 2010)

Company Filing History:

12 out of 123

Izumi Products Company

patents

3 out of 82

G-C Dental Industrial Corp.

patents

1 out of 13

Izumi Seimitsu Kogyo Kabushiki Kaisha

patents

4. 3 out of 834,601

Other

patents

where one patent can have more than one assignee

Years Active: 1985-2010

Loading Chart...

Areas of Expertise:

Rotary Electric Shaver

Electric Razor

Inner Cutter

Cutter Mechanism

Blade Force Up Spring

Dental Amalgam Alloys

Selenium

Dental Restoration

16 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 7743507 - Rotary type electric shaver (2010-06-29),

2. 7540090 - Rotary type electric shaver (2009-06-02),

3. 7356929 - Rotary type electric shaver (2008-04-15),

4. 6823590 - Electric rotary shaver (2004-11-30),

5. 6671960 - Electric rotary shaver (2004-01-06),

6. 6647626 - Electric rotary shaver (2003-11-18),

7. 6581289 - Inner cutter for an electric rotary shaver and an electric rotary shaver (2003-06-24),

8. 6460252 - Rotary electric shaver (2002-10-08),

9. D405921 - Cutter for electric shaver (1999-02-16),

10. D405231 - Cutter for an electric shaver (1999-02-02),

11. D361864 - Electric shaver (1995-08-29),

12. 5394611 - Electric razor (1995-03-07),

13. 4839964 - Fixing structure of blade force up spring for clothes shaver and (1989-06-20),

14. 4758274 - Dental amalgam alloys containing selenium (1988-07-19),

15. 4702765 - Method of making selenium-containing amalgam alloys for dental (1987-10-27),

Title: The Innovative Mind of Tsuyoshi Nakano

Introduction

Tsuyoshi Nakano is a prominent inventor based in Matsumoto, Japan. He has made significant contributions to the field of electric shavers, holding a total of 16 patents. His innovative designs have revolutionized the way electric shavers operate, enhancing user experience and efficiency.

Latest Patents

One of Nakano's latest patents is a rotary type electric shaver. This design features an outer cutter frame that is integrated into the shaver's main body. The outer cutter is equipped with a shaving surface on a ring-shaped thin layer portion. Additionally, an inner cutter rotates and makes sliding contact with the lower surface of the outer cutter. This unique design includes a thin layer portion that is convex upward in a radial and vertical cross-section. The thickness of this layer is smallest at the apex and gradually increases as the distance from the apex increases. Another notable patent is a rotary shaver that includes an outer cutter frame and an outer cutter with ring-shaped thin layer portions. The inner cutter rotates and cuts hair that enters through hair introduction openings, which are designed with a slit shape extending radially.

Career Highlights

Throughout his career, Tsuyoshi Nakano has worked with various companies, including Izumi Products Company. His work has focused on developing advanced technologies in personal grooming devices, particularly electric shavers. His innovative spirit and dedication to improving user

Profile summary based on public USPTO records.