Sorry all if this is old hat, but just did a search of Amazon for ABC / Bradshaw items, and came across numerous Patents someone is trying to sell.
This gave me the idea to Google Patents online, and have come across the following;
http://worldwide.espacenet.com/searchResults?page=2&ST=singleline&sortField=prd&query=GRANVILLE+BRADSHAW&locale=en_EP&DB=EPODOC&Submit=Search&ascending=false
Not all the patents are there, and not all have the full scans. But to trace the history, and maybe solve issues, the couple I looked at do have drawings. Even if not of use in restoration, they are interesting.
Nicholas Hill
