Yale Lock was invented by Linus Yale Jr. in 1860. He was born in April 4, 1821 and died in Dec 25 1968. Yale's lock used a flat key with serrated edges like the ones we still use today. Yale lock is based on a mechanism first employed by the ancient Egyptians over 4000 years ago.
1 comments:
I think you will find he died on Christmas Day 1868 not 1968!
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