It is known that the occupation time in the positive axis for a standard onedimensional Brownian motion follows the famous L(?)vy\'s are-sine law,and that in general intervals can be obtained explicitly or indirectly,while there are much less corresponding results in higher dimensions.

The occupation time in a cone in the positive quadrant for a standard two-dimensional Brownian motion is studied,and its first and second moments are given explicitly.

On Bona Fide Possession System under the Ownership with Unchanged Occupation;

Both of the innocent acquisition of movable propertied system and the ownership with unchanged occupation system are the products of modern society and economy.