That brings to mind two questions:
About when did farmers stop using their own corn as seed for the next crop?
and second question; if private corporations shouldn't be allowed to patent their seed, as it means they control a portion of or food production, explain to me why you aren't objecting to private corporations patenting life saving drugs, and thus controlling our opportunity to continue to stay alive?
I agree with patenting of drugs and intellectual property and art etc. Not animals or plants or other life forms.