Intellectual property is a broad heading used to refer to a wide variety of rights associated with inventions, discoveries, writings, artistic works, product designs, and designations of the source of goods and services. Patents and trade secrets are the most important of these sorts of intellectual properties in the field of biotechnology. One aspect of intellectual property that distinguishes it sharply from other forms of property-and for some people makes it harder to justify-is that intellectual properties may be possessed and used by many people simultaneously. This is not so for tangible property. If someone borrows my car, I cannot use it-nor can anyone else-until the car is returned to me, but if someone borrows my secret manufactu...