Google patent states un-named seedling x Avigon as the parentage.

Avigon is not listed in HMF but I will here:

According to the book, The Ultimate Rose Book by Stirling Macoboy, Avigon is a floribunda bred in 1974 by Cants of Cochester. It is bred from Allgold x Zambra. The blooms are formal, double, 2.5 inches, medium yellow on well-spaced clusters. it says that the bush is "tallish".