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Thread: Union 6-Lever Padlock
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15-05-24, 11:42 AM #1
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UNION push-key 6lever padlock
The patent, concerning ease of production, is 1939:
https://patents.google.com/patent/GB...en?oq=gb508247
Thes push-key padlocks were common in America than Britain. Their ancestor is Strutt's patent of 1818.
https://books.google.co.uk/books?id=...epage&q&f=true
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