UPDATE: This is the original patent for the Jeep-a-Loader! The application was first filed on February 07, 1955, by the Minneapolis Freeman Mfg, Co. (Out of Minneapolis??). I am guessing that the Jeep-A-Loader Corporation was a subsidiary or offshoot from the above parent company. The drawing shows that the Jeep-A-Loader was designed to fit over a CJ-3B (perhaps a CJ-5 as well), though the only one I’ve seen documented is fitted on a CJ-3A.
The filing date likely means this was manufactured around 1955, plus or minus a year. The patent was granted February 11, 1958.
This photo is from 2009:
From June 2008: A reader named Ed sent me some pics of a rare find he just purchased: A front end loader for a jeep from a manufacturer called Jeep-a-Loader. The serial number is 1001. The hydraulics system is powered by a Hy-lo hydraulic pump, which has been used to power other Willys devices. You can see an example of a Hy-lo pump here and here. Here are some pics below.