Your Jar Wrench with the cable (post #14), unless I am mistaken, was manufactured by the Flint Novelty Company.
Patent 1389515 was issued to one Alex Kikta of Flint, Michgan, on Aug. 30, 1921
The original patent design is actually for what we would today call a "Chain Wrench":

patent 1389515 Aug 30 1921 A. Kikta

USPTO Oct 21 1921 Patent 1389515 Aug 30 1921 A. Kikta
As near as I have been able to determine, Mr. Kikta was born in Austria in 1881.
The "family tree" stuff is a bit confusing for me - Woody is a bit more adept at that part of it.
Mr. Kikta apparently had a good imagination and a head for business, he also designed and marketed the "Shoot-O-Plane".

1906 Wooden and Willow-ware Trade Review Vol IV No 4 - Flint Novelty opening announcement

1926 Michigan Manufacturer and Financial Record Vol 36 pp 7 - Flint Novelty Co. "Shoot-O-Plane" announcement

patent 1541579 Jun 9 1925 A. Kikta
disclaimer:
This is all I was able to find on that unit. I am only ASSUMING that Flint Novelty is actually the company that stamped out the jar wrench, because there just isn't any other information available.
I'll have to look at the "Bonny" model later - too much on my plate right now.