The correct spelling of the surname is KRUSZEWSKI, The title Baron was given by Napoleon in 1813 to Louis for his participation in the battle of Dresden. Louis was apparently in Napoleon's army in 1808. There is also mention of a consideration of the title of Count (Comme) but not shown.
You can go to the Polish Nobility Association Foundation web PNAF.US and print a Heraldic Name Search application for more information.