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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 59 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 leading provider of high-quality testing instruments for various industries. With over 20 years of experience, we specialize in manufacturing precision instruments for testing materials, including plastic, rubber, textiles, and more. Our products are known for their accuracy, reliability, and durability, making us a trusted partner for quality control and research applications.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 30 2025

20 Patents

#1,172 in Tokyo

#2,889 in Japan

#30,350 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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