who invented the first digital camera and what company he or she worked for?

Answer 1

I believe the first commercially available digital still camera was the Sony Mavica in 1981. It was expensive, low resolution and not good for much. As a side note, I believe the first patents on digital imaging sensors belonged to Kodak. I don't believe any one person gets credit for either invention. About.com has good brief history of the digital camera at http://inventors.about.com/library/inventors/bldigitalcamera.htm

Answer 2

the first company was leica but it was only a test model and for pros