1885 - invention of process for seamless steel pipes from bar stock, Development History of Seamless Steel Pipe, https://www.supplychainquarterly.com/articles/

1885 - invention of process for seamless steel pipes from bar stock, Development History of Seamless Steel Pipe, https://www.supplychainquarterly.com/articles/3787-the-development-history-of-seamless-steel-pipe https://www.supplychainquarterly.com/articles/3787-the-devel... 1954 - first practical silicon solar cell, Timeline of Solar Cells, https://en.wikipedia.org/wiki/Timeline_of_solar_cells https://en.wikipedia.org/wiki/Timeline_of_solar_cells