Snow Guard Evolution Through the War Years (1941-1950)

My searching hasn’t turned up much for the 1940’s era. The one patent I found through a reference from a more recent patent is #2243256. This patent applies to a formed metal shingle. Built into the face of the shingle are several raised bumps. These bumps were likely inserted to stiffen the product and minimize damage during transportation and handling. I’m actually a little surprised that READ THE REST….