 |
|
2009
 No. 59 |
1 kg mass prototype, No. 94 |
Japan |
2003
| No. 74 |
1 kg mass standard in stainless steel, No. T 4 |
NMIJ AIST, Japan |
2001
| No. 78 |
Helium-neon laser at 633 nm, No. 180 |
NMIJ AIST, Japan |
 Study Notes
2005
| No. 15 |
Helium-neon laser at 633 nm |
NMIJ/AIST, Japan |
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