Archived posting to the Leica Users Group, 2000/02/18

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Subject: RE: [Leica] M Mount Patents
From: Austin Franklin <austin@darkroom.com>
Date: Fri, 18 Feb 2000 08:50:10 -0500
 
[Austin] JUST adding another lug would probably not be patentable, unless 
there were other elements to the 'invention'...  That could go on 
ad-nauseum..."well, I patented the 3,286 lug mount"...

- ----------

Perhaps the patent for the bayonet mount was in part through the advance of
using a four lug mount, rather than three lugs?
There were other cameras as well which preceded the Leica M in having
bayonet mounts. Take a look at the Steinheil Casca (on Stephen Gandy's
CameraQuest site, for example.