Below is the 1940 US Census for my great grandfather, Paul Junghans (line 42).
Paul was living at the home of his son, Paul Junghans Jr along with his daughter-in-law, Rosina (Billings) and their son Richard (line 41 above) in Fort Atkinson, Jefferson county, Wisconsin.
Paul Junghans Jr and Rosina are listed below (lines 39 & 40). It is difficult to make out, but appears Paul Jr was working as a sales engineer for Barn Equipment. Paul Sr had retired by 1940.
A legible, blank 1940 census form can be found here.