Feb. 4: Corporate Council SKH

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Relevant Patents

Glencoe/Rolf patent 2739518 (Issued in 1956, however, the device was marketed in May 1951, before Graham's '798 patent was filed)

Graham '811

Graham '798 "Clamp for vibrating Shank Plows"

Pfeifer Patent

Argument for Obviousness

Argument for Non-Obviousness

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