Sorry, I’ve been “offline” for awhile. Thank you to everyone, I very much appreciate all of your help!
I have been digging through piles of old family photos looking for clues, and found one. On the border of one of the photos was the hand written title “Stout Skycar”. The photos are from the Chicago area, and were probably taken around 1941-44. The Aerocar that Texastomcat linked to is very similar, and the Stout Skycar appears to pre-date it by just a few years. That would put the date at about the right point as well. The Aerocar in his link was dated 1949. Now I can start searching for the aircraft by name!
Here is a link to the clue photo:
http://user.mc.net/~cwz/aircraft06.jpg
My mother is one of the twin girls in the front seat of the aircraft. She celebrated her 70th birthday yesterday, so that helps to estimate the date as well. In this photo, it looks like the aircraft is still in the mock-up or construction stage of development.
The aircraft actually flew, and appeared to fly fairly well. I have home movie footage of it actually flying.
Original photos:
http://user.mc.net/~cwz/aircraft01.jpg
http://user.mc.net/~cwz/aircraft02.jpg
http://user.mc.net/~cwz/aircraft03.jpg
http://user.mc.net/~cwz/aircraft04.jpg
http://user.mc.net/~cwz/aircraft05.jpg