ship propellor (screw) ...a ship's propeller invented by John Patch in 1833

snowmobile...invented by Joseph-Armand Bombardier in 1922 

snow shoes

Stol aircraft

sewage recycling system

ski-binding

snowblower...invented by Arthur Sicard in 1925

snowplow (rotary)

Standard Time...invented by Sir Sanford Fleming in 1878

table-top hockey

telephone..invented by Alexander Graham Bell in 1876

telephone handset...invented by Cyril Duquet in 1878 

television...Reginald A. Fessenden patented a television system in 1927

toboggan

Trivial Pursuit...invented on December 15, 1979 by Chris Haney and Scott Abbott

time zones

tipi (teepee)

totem pole

underseas telegraph wire...invented by Fredrick Newton Gisborne in 1857