Sorry, you must have the wrong number https://www.mattelston.com/prednisone-10-mg-price-c61d.pdf prednisone 10mg dosage for asthma  What if we changed the law so a patent was protected like a trademark: use it or lose it. Trademarks lose legal protection if they aren't actively used in commerce. There would have to be a trade-off with this change, however. Patents currently expire after 20 years (an eternity in computers). Trademarks can be owned indefinitely as long as they are kept in use. It would be a major change to let patents be protected forever as long as they are being applied: a useful patented drug would never have a generic version. On the other hand, patent trolls would be wiped out.