This is the site for Seminis seeds- which was quietly purchased by Monsanto so now all their seeds fall under the Monsanto patents. Check the list to see if you have planted any Monsanto varieties- it is a rather large list.
The Seed Savers Exchange is a group from Decorah, Iowa that work to keep a stock of non-hybrid, heirloom seeds. They make seeds available to purchase. Biodiversity instead of hybrids.