Homework 3: Validity of Graham Patent (Ackroyd)

Litigated Patent: '798 (2627798) by Graham (1953)

Previous Patent: '811 (2493811) by Graham (1950)

Previous Patent: '451 (2014451) by Pfeifer (1935)

Argument For Validity

The litigated patent ('798) ought to be considered valid and the patent upheld, due to the decisions set forth in similar instances concerning dubious obviousness issues. Mr. Graham redesigned his shank plow invention in the time between the '811 patent and the improved '798 patent. The new patent was necessary, based both on the success it won in public sales as well as the wear reduction required by the field. By altering his hinge positioning, Graham was able to improve the lifetime of shank plows through a reduction of wear due to the decreased forces. While the need for this invention may have been obvious, the manner for achieving the necessary results was not as obvious, since it took Graham years to improve on his old invention in a new and effective way. As seen in the case of Anderson's Black Rock, Inc. v. Pavement Co., 396 U.S. 57 (1969), an invention should be considered patentable if the combination of its parts produces a greater result than parts individually. In the case of Black Rock, the combination of parts did not achieve a better outcome than the parts were able to individually, and as such the patent was invalid.