<p>A curved ball court having a raised part extending from the front of the court towards the central region of the court, a concave playing surface at each side of the raised part, a vertical curved rear wall, the rear wall and the concave playing surfaces being connected by a parabolic curve.</p>
申请公布号
CA1147766(A)
申请公布日期
1983.06.07
申请号
CA19810372792
申请日期
1981.03.11
申请人
BATES, FARRELL C., 639 NORTH VICKERS STREET, THUNDER BAY, ONTARIO
发明人
BATES, FARRELL C., 639 NORTH VICKERS STREET, THUNDER BAY, ONTARIO
