Apr 29, 2021 · US Patent 780,476: Endless chain-saw by Samuel J. Bens. The very first chainsaw, although a large static machine and not a portable handheld saw. US Patent 1,617,565: Tree sawing apparatus by Samuel J. Bens, Chain Saw Corporation. A slightly later, portable, gasoline-powered chainsaw that Bens invented in 1921, with the patent granted in 1927.
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