Is Canon Developing a New 300mm Lens?

Over the years, Canon has released multiple patents that showcase its research on various lenses. For instance, we have patents for 300-800mm f8L IS USM, 200-400mm f4 IS USM, or the 500mmf4 IS. Although none of the lenses have become a reality, this highlights the importance of telephoto lenses for Canon users. Adding to this list is the new patent for three prime telephoto lenses, which feature a fast aperture. Here is a glimpse into the patents.