The camera company Minolta has a blue circle with white lines.
The company logo with a blue square and white G is for Gap. Gap is an American retail company founded in 1969.
There are many companies that can have the same logo with different coloring. A company names Aegon and a blue square with the letter A in it.
Allianz,
The Amtrak logo has 3 diagonal blue lines. The name Amtrak is in blue letters and underneath run three diagonal lines going to the left.
Ryanair.
Hilton
Scotland (a white diagonal cross on a blue background)
Aol is the company who's logo you described.
Goldman Sachs
Perhaps you are thinking of the flag of Panama, which has a white square in the upper left-hand corner with a blue star in the middle, a red square in the upper right-hand corner, a blue square in the lower left-hand corner, and a white square with a red star in the middle in the lower right-hand corner.
Piaggio
Billabong