The first commercially produced available glass hummingbird feeder was apparently sold by the Audubon Novelty Company in Medina New York in 1950. The "Webster Feeder" had been designed by a man in the 1930s for his wife and became well-known after photographs of hummingbirds at the feeder appeared in a 1947 National Geographic article. You can read about this in the book Hummingbirds of North America: Attracting, Feeding and Photographing.
I haven't found anything on hummingbird feeders from countries other than the U.S. Are you interested in a particular geographic area or time period?
We also have several articles on making glass bird feeders, if you are interested.
Let me know what you are most interested in and I will see what we have!
Best,
