Earlier quoted context omitted.
Your solution would stop innovation in any industry
Innovation happens because people are curious and want to make their (or other's) lives easier, this has nothing to do with patents, or if it's private or government run. Want to see real innovation? See for example the home made radio receivers people made in WWII, that fit in a small tin can, or visit an Amish settlement ( http://kk.org/thetechnium/amish-hackers-a/ ). Not to mention hacker/maker spaces and fablabs,…
Hobbyists tinkering in a hanger did not create modern airlines - giant corporations like Boeing managed the capital required to make it happen.
Hobbyists tinkering in a garage are not going to be able to carry out years of dedicated research followed by years of study followed by years of clinical trials.