> "exclusive Right for limited > Times" is rather concrete concept, but the "intellectual > property", on the > contrary, is a broad and generic concept In general usage, but not in legal usage. The text "Law and Economics" (ISBN 0-673-46332-X) p. 72, under "The Legal Concept of Property" says "From a legal viewpoint, property is a 'bundle of rights'. These rights describe what people may and may not do ..., the extent to which they may ... or exclude others from their property. These rights are not immutable; they may, for example, change from one generation to another. But at any given point in time, they constitute the detailed answer of the law to (1. How are ownership rights established? 2. What can be privately owned? 3. What may owners do with their property? 4. What are the remedies for the violation of property rights?)" So the legal term "property" is really quite general, which I agree is confusing when the term is used in common speech.