1955
Jack Stephenson makes his first zipperless, box walled, down filled sleeping bag
1956
Jack Stephenson starts business making sleeping bags
1957
prototypes sleeping bags with dual zippers
make sleeping bags with shaped fitted hood adjusted by zippers
Starts selling frame packs, known as Jackpacks, that had full hip belt and aluminium box storage
1958
makes sleeping bags with high tenacity ripstop nylon
experimented with down filed air mattresses
1959
developed the Warmlite Triple Bag, with two different thickness tops
1961
prototype 2 man tunnel tent, with three hoops
Production of Jackpacks cease
1962
makes Warmlite sleeping bags with twins zippers, one for outer shell and one for inner shell
1964
supplied sleeping bags, box walled down parkas, overboots and tents to Karakorum Expedition
makes tents with polymer coated, high tenacity ripstop nylon
1965
exhausted supply of magnesium tent tubing
moved to aluminium 7001-T6 (as used for archery arrows) for tent tubing
Started production of Model 6 tent
makes sleeping bags with built-in foam base
1966
makes sleeeping bags with vapour barrier fabric inside
1967
Jack’s son, George, joins business full time, making tents
1969
prototyped a vapour barrier shirt
1970
Jack Stephenson leaves work in aerospace industry to go fulltime with Stephenson Warmlite
makes Model 8 tent
releases Go-Lite packs, with aluminized fabric and lighter weight frames
1972
developed the drop-front option for tents for stargazing
Warmlite Triple sleeping bags made available with outer and inner top panels both removable
1973
included zippers on tent vents
made No Sweat Shirt, possibly first commercial vapour barrier garment
1974
aluminized fabric coating became standard for all tents
1980
produce 48 page colour catalog. Sold for $3 and contained photos of naked family and friends
Annual production of tents is about 600 units
1982
fire gutted house and destroyed computer and most records