Today in 2005, US Patent PP15663 P2 was issued, an invention of Charles E. Zimmermann, assigned to Select Botanicals Group, L.L.C., for his “Hop Plant Named ‘YCR Accession No. 4.'” Here’s the Abstract:

A new hop plant (Humulus lupulus) is disclosed. The new variety is used for its aromatic properties. The new variety is moderately tolerant to powdery mildew, and produces a medium size moderately compact cone with good pickability and storageability. The cones mature relatively late, and produce an exceptional yield of approximately 2200 to 3000 pounds per acre (2466 to 3363 kg/ha).