| Time | Event |
|---|
| 1950.12 | Founded by Mr.Hisatake Tamaru and produced ALSO |
| 1952.02 | Factory moved to Meguro,Tokyo |
| 1953.05 | Developed Insulating oil tester |
| 1957.09 | Developed Acid Value Measuring Test set |
| 1958.06 | Developed ALSO hot line oil purifier |
| 1960.12 | Developed Vacuum Oil Purifier |
| 1964.12 | Developed Gasoline register |
| 1967.03 | Developed Dry Air Generator |
| 1970.03 | Expanded Head office Factory |
| 1972.06 | Developed Oil Filter |
| 1974.05 | Developed Turbine Lube Oil Conditioner |
| 1984.02 | Developed Automatic Dissolved Gas Analyzer |
| 1985.07 | Approved as Hitachi’s authorized factory Developed Flon carbon handling system |
| 1986.03 | Developed Dissolved gases detector |
| 1988.10 | Approved as Mitsubishi Heavy industrial’s authorized factory Developed New Refrigerant Vacuum Oil Purifier and refrigerant charging machine |
| 1995.01 | Company name changed to Sanmi corporation |
| 1996.05 | Yamagata factory established, Elmex business established,Developed Gas Monitor |
| 1997.12 | Moved Head Office factory to the present address, developed mass-flow refrigerant charging machine |
| 1998.10 | Developed Mass-flow type oil charging machine |
| 2000.04 | Handling import products, Radiator from TTP, India |
| 2018.03 | Acquired ISO9001:2015 certification for Design, development and manufa cture of heavy electric equipment |
