Public domain
Plant breeders' rights are granted for a limited term. Upon expiration, the variety enters the public domain: its seeds can be propagated and sold without the rights holder's license.
Recent years are the most sought-after: the variety is free to use but still in production.
Phaseolus vulgaris L. · Common bean
Triticum aestivum L. · Bread wheat
Lactuca sativa L. · Lettuce
Brassica oleracea L. (Cauliflower Group) · Cauliflower
Solanum lycopersicum L. · Tomato
Beta vulgaris Sugar Beet Group · Sugar beet
Helianthus annuus L. · Sunflower
Festuca rubra L. · Red fescue
Cucumis sativus L. · Cucumber
Festuca rubra L. · Red fescue
Linum usitatissimum L. · Common flax
Brassica oleracea L. (Cauliflower Group) · Cauliflower
Phaseolus vulgaris L. · Common bean
Triticum aestivum L. · Bread wheat
Cucurbita pepo L. · Field pumpkin
Trifolium repens L. · White clover
Zea mays L. · Maize
Hordeum vulgare L. · Barley
Cucurbita pepo L. · Field pumpkin
Daucus carota L. · Carrot
Gerbera L. · Gerbera
VAN VEEN WILHELMUS LEONARDUS ANTONIUS
Zea mays L. · Maize
Poa pratensis L. · Kentucky bluegrass
Lolium perenne L. · Perennial ryegrass