Question: Which shoe that R. Griggs Group Ltd. has the patent to produce is distinguished by its air-cushioned sole (dubbed "Bouncing Soles"), upper shape, welted construction and yellow stitching?
Sentence (from "Solovair"): Shoe manufacturer R. Griggs Group Ltd. had the patent to produce Dr. Martens boots but not the technology so in 1960 Griggs and NPS collaborated to create a boot using a Solovair sole and a Griggs boot, the result was the now iconic Dr. Martens boot.
Relevant evidence: Yes