That's a neat grouping of wrenches Bus, and congrats on getting that Du Charme last week.
As regards locating others that are similar, the "Citations" feature of Google Patents is a trick that sometimes helps:
First go to the Google Patent page for your Du Charme wrench, pat 1293735
https://www.google.com/patents/US1293735If you scroll all the way down to the bottom of that page, you see where the patent was REFERENCED BY two other more recent patents. Click on the Feb. 19, 2002 one by Jeffrey Weaver. (Which looks like a pretty neat rotating head wrench itself.)
https://www.google.com/patents/US20030154828Now scroll all the way down to the bottom of that page, and under PATENT CITATIONS you get a list of 13 similar wrench patents. Clicking through them, I see a couple that you already have in your collection, but there are others that might still be out there....
![](http://img.photobucket.com/albums/v307/jooliesews/Bobbys/Bobbys%20III/2e5c3e4b-5210-4858-968d-951c15ba1958_zpsi1tcocjh.jpg)
Hope that helps,
Bob