"This invention relates to a new and distinct variety of Rugosa Rose. It has as its seed parent a variety known as “Niven's White’ Rugosa’ (not patented), and as its pollen parent an unknown Rugosa rose. It was hybridized by Jay Kapac."
Thank you, patent information and parentage added. Seed parent in patent is mentioned as 'Niven's White'. This is probably an error for 'Nyveldt's White'.