Otto Frederick Rohwedder-
he invented sliced bread.
Dean Kamen had invented many things, but one of the most famous is the Segway.
Alexander Graham Bell was a Scottish inventor who invented the Telephone.John Logie Baird was also a Scottish Inventor who Invented the Television(T.V)Scottish people invented a lot of stuff :)And finally,Thomas Edison who invented the most valueble,useful household item,the lightbulb:)
Anything you believe should be invented, invent it! Think, what do you think could be useful that doesn't exist?:-)
Lonnie G. Johnson has invented many things, but he is most famous for his revolutionary water gun, the Super Soaker.
Chocolate Chip CookiesPost ItCoca ColaFrisbessIf you'd like to read more details about things invented by accident, take a look at this: http://weird.answers.com/facts/ten-of-the-most-famous-things-invented-by-accident
The inventor invented lots of useful things
They invented drawing on rocks with wedges, and they also invented Hammurabi's Code. This is a revised answer, hope you found it useful.
The most common sport is soccer. It is played in nearly every country. Lots of sports are useful. Running is very useful before breakfast. There is not a most useful sport because lots are for different things.
a personal organiser is most useful for people who need to keep ontop of a lot of things and information, things such are business dates or trip, phone numbers and addresses.
Elijah McCoy
He was a scientist, mathematician and an artist!
He invented many things, most commonly the Bunsen burner. See the related link for a few more things he invented.
I think it was the ancient romansthis is based purely on past knowledge (i know they invented quite a few weird but useful things like that), and something I'm sure i read on the net.
It is Elijah McCoy-Rayonna
one of the most modern medicine finds was invented by a Greek "the PAP test" all gynecologists swear by.
Dean Kamen had invented many things, but one of the most famous is the Segway.
Sarah Boone invented the first ironing board. Elijah McCoy invented the portable ironing board, tire tread, and the lawn sprinkler.