Drew,
Well done!
A note to most readers. Some of the dates are approximations. Some are based on single sources. As more research is done, we will cross check sources whenever possible. We should be able to firm-up the dating.
The "Golden Age" circa 1830-1910 is was not included. It will require a little more effort. There are many "sources" for this period. Some of which do agree as to dating. The firmest dates will no doubt come from patent information. We are still looking for Russian, German, Italian, Spanish, etc patents from the Golden Age. The English, French, Belgian and American fronts are pretty well covered.
Also the Ottoman period of influence is still being researched. More than any other sphere of influence, the Ottoman's were response for the diffusion of gunmaking technology. They had established armouries throughout the Persian gulf. In some sweeping moves, they established gunmaking centers in the mediterranean which traded with western Europe. Additionally, they employed many Europeans in Istanbul for the purpose of making weapons.
If you have or know of sources to add to this work, please contribute. We are all learning.
Pete