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Calum,I tried the Italian Patent and Trademark Office but a search for the 1937 patent produced no result. I then found some information on Google Patents. It mentions an application filing on January 27, 1939 and what I presume to be a reference to the original Italian patent, given as IT2310773X. The US filing is dated January 26, 1940.[URL unfurl="true"]https://patents.google.com/patent/US2310773A/en[/URL]
Calum,
I tried the Italian Patent and Trademark Office but a search for the 1937 patent produced no result. I then found some information on Google Patents. It mentions an application filing on January 27, 1939 and what I presume to be a reference to the original Italian patent, given as IT2310773X. The US filing is dated January 26, 1940.
[URL unfurl="true"]https://patents.google.com/patent/US2310773A/en[/URL]
