We started out with three each of three different types of plants: one member of each set was given water that had been boiled on a gas stove, water that had been boiled in a microwave oven, or water that had not been boiled at all.
Drug patent protection: How long is long enough? A recent Senate committee hearing on Bill S-17, Parliament's effort to comply with international trade rules by extending pharmaceutical patent protection to 20 years, inadvertently opened the door to a broader investigation of the inner workings of the country's pharmaceutical patent legislation.
Modern patent laws Modern patent laws protect the inventor for a specific period of time(usually 20 years) during which, in general, it is illegal for anyone else tocopy, use, distribute or sell the invention without the approval of theinventor.