| 1957 |
Experimental research into thermoelectric semiconductors began at Komatsu Ltd. |
| 1959 |
Marketing of thermoelectric cooling applied equipment (Photomul cooling equipment for astronomical telescopes) was begun. |
| 1960 |
Komatsu Electronics Inc. was established. The research and development division of Komatsu Ltd. became an independent entity to commence production of thermoelectric cooling semiconductor materials and production and sales of cooling Thermo-Panels and its applied equipment. |
| 1963 |
The COOLNICS Series was developed and preparations for its mass marketing were completed. |
| 1966 |
Japan Solidate Co,.Ltd. was established. It separated from Komatsu Electronics Inc. and became an independent exclusive manufacturer specialized in electronic refrigeration equipment. |
| 1967 |
Company name was changed to Komatsu Solidate Co,.Ltd. |
| 1970 |
Sales of Thermoelectric Isothermal Bath and Zero-Con started. |
| 1971 |
Sales of Thermoelectric Dehumidifiers for gas analyzers started. |
| 1972 |
Company name was changed to Komatsu Electronics Inc. It became a 100%-owned subsidiary of Komatsu Ltd. |
| 1975 |
Sales of multi-purpose Thermo-Modules started. |
| 1976 |
Sales of micro Thermo-Modules started. |
| 1982 |
Construction of the factory was completed. |
| 1983 |
Sales of the Chemical Circulator series for silicon wafer wet processing stated. |
| 1985 |
Mass production facilities for multi purpose Thermo-Modules were installed. |
| 1988 |
Mass production of micro Thermo-Modules using the hot press method started. |
| 1989 |
Robots for assembly of micro Thermo-Modules were adopted. |
| 1991 |
Construction of the new factory was completed and part of the production facilities were moved there. Sales of CS-Heaters and Multi-Controllers started. |
| 1992 |
Sales of DI-Water Heaters started. |
| 1994 |
The award for our outstanding “Proactively” was presented from Northern Telecom. |
| 1995 |
Sales of Precise Air Conditioning Units started. |
| 1999 |
Sales of re-circulating heating and cooling units started. ISO9001 was certified. |
| 2000 |
ISO14001 was certified. Sales of Coolbit started. |
| 2002 |
Sales of Mini-TEC started. |
| 2005 |
Sales of Compact Multi-stage Module started. |
| 2008 |
Company name was changed to KELK Ltd. |
