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This week in 1880 – Francis Clarke and M.G. Foster patented the electrical hearing aid.
1896 – The Addressograph labeling system was patented by Joseph Smith Duncan of Sioux City, IA.
1967 –Soyuz 1 (soy-ooze), a Russian manned spaceflight carrying cosmonaut Vladimir Komarov was launched into orbit. He completed 13 orbits around the earth before re-entering the atmosphere and ultimately losing his life when the spacecraft’s main parachute failed to open. He was the first human to fly into space twice and the first to die during a mission.
1981 – The first integrated mouse intended for use with a personal computer made its appearance with the Xerox Star workstation.
1994 – Commodore International, maker of the popular Commodore 64, VIC-20 and Amiga systems fades into history as it declares bankruptcy and 
meets its end.
And this week in 2005 – The first ever First YouTube video was uploaded by co-founder Jawed Karim, titled “Me at the zoo”.