When the USPTO was rejecting software patents
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The examination guidelines of the US patent office in 1968 were mandating examiners to reject software patents. The law is still the same, but the USPTO practice changed with the CAFC decisions.
When the USPTO was rejecting software patents
zoobabzoobab 1206616225|%e %b %Y, %H:%M %Z|agohover

A paper titled State of Confusion explains the history of software patents in the United States. The presentation mentions the 1968 of the US Patent Office examination guidelines:

PTO’s 1968 Guidelines

Instructed all patent examiners to reject all computer program-related inventions as unpatentable subject matter.

If all computer program-related inventions were unpatentable subject matter at that time, and considering that the law did not change, why does the USPTO is granting zillions of software patents right now? Answer: the CAFC decisions that made all computer program-related inventions as patentable subject matter.

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