Coplen v. United States

doctrine of equitable estoppel will be applied, in appropriate case, to prevent United States from denying existence of a contractual agreement | warrant or exigent circumstances required for seizure of parked aircraft after officer looked in window and spotted marijuana debris | warrant or exigent circumstances required for seizure of parked aircraft after officer looked in window and spotted marijuana debris | no search to view interior of aircraft standing in public place | interior of airplane visible from parking lot of airport | in such cases "surveillance" might be the better word | in such cases “surveillance” might be the better word | inapplicability of section 558(c) to failure to renew license | inapplicability of § 558(c) to failure to renew license | “Implied-in-fact contracts differ from contracts implied in law (quasi-contracts