Canon EF-S 15-105mm f/3.5-5.6 IS USM lens patent

Canon filed a patent for a new EF-S 15-105mm f/3.5-5.6 IS USM lens in Japan:

This lens will probably be the replacement of the current Canon EF-S 15-85mm f/3.5-5.6 IS USM UD which has identical design:

Patent details: