The phrase from the article's sample "The phrase "Those Old Piano Blues" is roughly equivalent to "an estimated amount."
The phrase "Those old Piano Blues" or "The Old Piano Roll Blues" refers to a legal defense (or the counterargument) in US patent law involving computer software.
After Benson, the Court of Customs and Patent Appeals adopted the stance that Benson's logic did not apply to "machine" claims, such as a claim to an ordinary digital computer that has been programmed to execute a novel algorithm or computer software. Judge Rich dissented from that decision, arguing that the Supreme Court in Benson did not restrict the principle to technique claims "the legal philosophy.
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