MSR or Mountain Safety Research, was founded by Larry Penberthy in 1969. Their first product was the MSR Model 9 camping stove, which separated the stove burner from the fuel tanks and pressurised the fuel tanks. Penberthy is also credited with the introduction of metal shafted ice axes.
These days MSR is owned by Cascade Designs who produce a number of great climbing and mountaineering products, including the ThermaRest.
For more information about Cascade Designs check out their website: