140 N.W.2d 132 SCHILDBERG ROCK PRODUCTS CO., INC., appellee, v. WILLIAM R. BROOKS et al., appellants. No. 51933.Supreme Court of Iowa. February 8, 1966. CORPORATIONS: Defendants shown to be officers and directors 1 when they seized corporate opportunity. Evidence in an action to require defendants to assign mineral lease acquired by them supports a finding […]