https://nikonrumors.com/2012/09/08/the-latest-nikon-patents-6.aspx/
The latest Nikon patents - Nikon Rumors
Sep 8, 2012 - Nikon filed patent 2012-155026 in Japan for a lens adapter with adjustable flange back. The helicoid ring allows to further close focus the lens (similar...
the latestnikon patentsrumors
https://petapixel.com/2017/09/07/nikon-patents-2-full-frame-mirrorless-lenses-52mm-f0-9-36mm-f1-2/
Nikon Patents 2 Full Frame Mirrorless Lenses: 52mm f/0.9 and 36mm f/1.2 | PetaPixel
Sep 8, 2017 - Speculation about Nikon's mirrorless camera ambitions is heating up, and two new patents are adding fuel to the fire. Nikon has patented two new
nikon patentsfull framemirrorless lensespetapixel
https://www.jonesday.com/en/practices/experience/2019/03/canon-and-nikon-win-eight-iprs-against-two-papst-patents
Canon and Nikon win eight IPRs against two Papst patents | Experience | Jones Day
jones daycanonnikonwineight