If I have an idea for something, how do I know its not already invented?

Question

If I have an idea for something, how do I know its not already invented?

Answer 1

You can just go to the official patent and trademark office and search you idea in the top right corner of your screen, heres the address

http://www.uspto.gov/

good luck

Answer 2

just ya know look it up on the computer or in a book and if not you sould see and then check again.

Answer 3

Check to see if its been patented.

http://www.uspto.gov/patft/