I didn't really know anything about the pattern or who made it, so I did a little research. The pattern is called "Park Avenue" made by the Federal Glass Co in the 1940s. The color is called "Ruby Flash". To make it ruby colored they had to put a thin layer of colored glass over clear glass and reheat or flash it to bond them. In the picture above you can see the company mark, an F in a shield.
I really love the color. Maybe I should start a collection of ruby glass...