155 S.E.2d 385 SILVERBERG et al. v. PHOTO-MARKER CORPORATION OF ATLANTA. 24092.Supreme Court of Georgia.ARGUED MAY 9, 1967. DECIDED MAY 18, 1967. A restrictive covenant in an employment contract prohibiting the employee for a period of eighteen months from soliciting or attempting to solicit “customers, business or patronage from any persons with whom he may […]