770 A.2d 1120 TOWN OF SALEM v. RICHARD WICKSON. No. 99-283Supreme Court of New Hampshire Rockingham Decided April 24, 2001 1. Zoning and Planning — Generally — Exceptions,Variances, and Nonconforming Uses The right to maintain nonconforming uses is meant to protect property owners from a retrospective application of zoning ordinances, so that property owners may […]