Practice golf ball

Claim 1

A PRACTICE GOLF BALL HAVING A SPHERICAL SHAPE FOR USE ON AN INDOOR FLOOR SURFACE AND WHICH SIMULATES THE ACTION OF A STANDARD GOLF BALL WHEN USED ON A PUTTING GREEN COMPRISING: A SPHERICAL BODY, SAID BODY INCLUDING A SUBSTANTIALLY NON-DEFORMABLE CENTER UNIT AND A DEFORMABLE COVER MEANS FOR PROVIDING AN AREA CONTACT WITH SAID SURFACE WHEN THE BALL IS ROLLED THEREOVER, SAID PRACTICE GOLF BALL BEING SUBSTANTIALLY OF THE SAME WEIGHT, SIZE AND SHAPE AS THE STANDARD GOLF BALL, SAID COVER MEANS SURROUNDINGLY ENGAGED WITH AND SECURED TO SAID CENTER UNIT AND WITH THE PORTION THEREOF CARRYING THE WEIGHT OF THE BALL FLATTENING OUT TO PROVIDE SAID AREA CONTACT BETWEEN THE BALL AND SURFACE DUE TO THE WEIGHT OF THE PRACTICE BALL ALONE, SAID AREA CONTACT PROVIDING A FRICTIONAL RESISTANCE WHICH CORRESPONDS TO THE FRICTIONAL RESISTANCE ENCOUNTERED BY A STANDARD GOLF BALL WHEN USED ON A PUTTING GREEN.