Breeder
HAMMETT KEITH
12 US plant patents, granted between 2007 and 2019.
Filed under the HAMMETT name. Related entities are listed separately on the HAMMETT search, because a company and a person are not the same filer even when the name matches.
Still under patent — 11 cultivars
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- Zone TenPP19885Dahlia plant named ‘Zone Ten’UNDER PATENTNovember 7, 2027
- BEST BETTPP20954Dahlia plant named ‘BEST BETT’UNDER PATENTAugust 18, 2028
- 3013/01PP21879Cosmos plant named ‘3013/01’UNDER PATENTSeptember 30, 2029
- MYSTIC ENCHANTMENTPP23332Dahlia plant named ‘MYSTIC ENCHANTMENT’UNDER PATENTSeptember 6, 2031
- Mystic HazePP23501Dahlia plant named ‘Mystic Haze’UNDER PATENTOctober 11, 2031
- MYSTIC WONDERPP24397Dahlia plant named ‘MYSTIC WONDER’UNDER PATENTMarch 2, 2032
- Mystic MemoriesPP25356Dahlia plant named ‘Mystic Memories’UNDER PATENTOctober 4, 2033
- Mystic FantasyPP25417Dahlia plant named ‘Mystic Fantasy’UNDER PATENTOctober 4, 2033
- Mystic SparklerPP28741Dahlia plant named ‘Mystic Sparkler’UNDER PATENTFebruary 12, 2036
- 71853-09PP28764Dahlia plant named ‘71853-09’UNDER PATENTMarch 17, 2036
- Mystic WizardPP30993Dahlia plant named ‘Mystic Wizard’UNDER PATENTMay 17, 2038
Already in the public domain — 1 cultivar
Most recently freed first. Anyone may propagate and sell this plant — though the name it is sold under may still be a live trademark.
- KnockoutPP18339Dahlia plant named ‘Knockout’PUBLIC DOMAINAugust 23, 2026