US patent laws come from sewing machines, and Husqvarna sewing machines come from an ancient musket company.

Reading references:
https://www.gsnsp.com/sewing-machine-war-elias-howe-vs-isaac-singer/
https://ismacs.net/husqvarna-viking/index.html
https://silverbobbin.com/vintage-viking-sewing-machine/

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Patents and Chainsaws