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Suga Test Instruments Co., Ltd.

USPTO Granted Patents = 20

Trademarks = 1

Forward Citations = 208

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17 inventors (with patents filed for the assignee):

Nagaichi Suga (8 out of 10 patents)

Shigeru Suga (7 out of 22 patents)

Taro Mori (4 out of 4 patents)

4. Shigeo Suga (3 out of 3 patents)

5. Kenhachi Mitsuhashi (3 out of 7 patents)

6. Yoshio Sasho (3 out of 3 patents)

7. Shinichi Katayanagi (3 out of 4 patents)

8. Hiroshi Matsuki (2 out of 4 patents)

9. Takao Sumiyoshi (2 out of 3 patents)

10. Etsuji Natori (2 out of 2 patents)

11. Kiyoshi Chaki (2 out of 2 patents)

12. Koichi Taniguchi (1 out of 62 patents)

13. Hiroshi Ozawa (1 out of 10 patents)

14. Kenji Nishiwada (1 out of 1 patent)

15. Fujio Suga (1 out of 1 patent)

20 patents: Sort by Forward Citations

1. 9063050 - Weathering test instrument and solid-state light-emitting device system (2015-06-23),

2. 6591701 - Weathering test apparatus having a long-arc type air-cooled vertical metal halide lamp (2003-07-15),

3. 5667647 - Oxygen-hydrogen electrolytic gas generation apparatus (1997-09-16),

4. 5305634 - Weathering test method and sample holder used therein (1994-04-26),

5. 5138892 - Accelerated light fastness test method (1992-08-18),

6. 4983526 - Method of measuring and controlling ozone concentration (1991-01-08),

7. 4975047 - Oven provided with oxygen concentration controls (1990-12-04),

8. 4954693 - Ventilation regulated hot air supplied constant temperature oven (1990-09-04),

9. 4912365 - Automatic carbon-replacing weather resistance testing apparatus (1990-03-27),

10. 4831564 - Apparatus for estimating and displaying remainder of lifetime of xenon (1989-05-16),

11. 4809514 - Apparatus for removing snow deposited on wall of snow generating (1989-03-07),

12. 4798331 - Artificial snow production apparatus (1989-01-17),

13. 4792093 - Artificial snow wetting apparatus (1988-12-20),

14. 4770534 - Color indication comparison method (1988-09-13),

15. 4768711 - Apparatus for changing artificial snow to wet snow (1988-09-06),

Suga Test Instruments Co., Ltd. is a prominent manufacturer based in Tokyo, specializing in precision measurement and testing instruments. The company focuses on developing high-quality equipment for various applications, including industrial testing, environmental monitoring, and quality assurance. With a commitment to innovation, Suga integrates advanced technology into its products, catering to diverse sectors such as manufacturing and research. Their expertise in measurement technology positions them as a key player in enhancing operational efficiency and product reliability.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

20 Patents

#1,343 in Tokyo

#2,944 in Japan

#31,233 in the World

Suga Test Instruments Co., Ltd.

Forward Citations = 208

17 inventors:

Nagaichi Suga (8 out of 10 patents)

Shigeru Suga (7 out of 22 patents)

Taro Mori (4 out of 4 patents)

4. Shigeo Suga (3 out of 3 patents)

5. Kenhachi Mitsuhashi (3 out of 7 patents)

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