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- History of Trumpet Trademark
Before the Trumpet, the following logos have been used for the Seirogan.

| Generation I | 1902 |
Chuyu-Seirogan | ![]() |
The character "Cheng (誠)", which means honesty in English, is added at the heart of the globe |
|---|---|---|---|---|
| Generation II | 1949 |
Nakajima-Seirogan | ![]() |
The character "Cheng (誠)", which means honesty in English, is added at the heart of the globe |
| Generation III | 1969 |
Seirogan | ![]() |
The Trumpet trademark is added at the heart of the globe |
| Generation IV | 1972 |
Seirogan | ![]() |
The Trumpet trademark |





















