Whilst undertaking some research, I happened upon a Website that has links to Dozens of Patents that may also be of interest to other Lathe Trolls. This Website reference, may well be posted elsewhere on the Forum, but I've done a cursory search and thus far can't find it. It has a Veritable "Treasure Trove" of Information, containing a Brief Synopsis of what is contained within the Various Patents, and the Patent Numbers themselves, contain Hyperlinks to take you straight to whatever you might be interested in.
The Website :- http://www.resfreq.com/phonomusings/phonopatents.html
I hope other Lathe Trolls find this link usefull.
Regards
Soulbear