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Chan Eil Whiskers
Fumbling about.
There are a number of patents for one piece DE razors pre dating the Segal, including the O'Malley patent of 1925, which Gillette bought and used as the basis for its patent infringement lawsuit against Segal, and the Edmonds and Dunn patents of 1909 and 1913 respectively.
The patent for the Gem Micromatic TTO dates from 1930.
Thanks. Good information.