Good work on the patent, Sid. This is a pretty typical plain "molasses can" of the 1870-1880s and could have been made by many of the Pittsburgh-area tableware factories or plants in other cities such as Wheeling. The handle is solid glass, so it is gathered and applied by a skilled finisher: stick the bottom first, draw it out a bit and cut off; stick the top; then use a carbon rod to bring the handle to its final shape. I would like to see down inside the metal cover, but I suspect the handle was applied while the body was still on the blowpipe. Otherwise, you would have to have a snap to hold the piece by the top or the bottom.