The Oyez Project: Economic Activity Issues - Patentability of Computer Processes

Dann v. Johnston

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Diamond v. Bradley

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Diamond v. Diehr

Engineers James Diehr and Theodore Lutton invented an improved press that cured rubber by controlled heating. The press contained a temperature probe which measured the temperature rise of the rubber from within the press. By repeatedly calculating the rubber cure time from this temperature measurement and comparing this computed cure time to the actual elapsed time, the computer was able to determine precisely when to open the press and eject the cured rubber, which then emerged perfectly cured. The patent examiner, viewing all computer programs as unpatentable because of the earlier Supreme Court decision Gottschalk v. Benson (1972), rejected their patent application because, he argued, the inventors had simply combined an unpatentable program with a conventional rubber curing press. An appellate court reversed the Examiner and ordered a patent to issue. The Commissioner of Patents then petitioned successfully to have the Supreme Court review this decision. Before the Supreme Court, the inventors' attorney argued that the steps of continuously measuring temperature and repeatedly recalculating the rubber cure time and comparing it to the elapsed time were new steps that were worthy of patent protection.

eBay v. MercExchange

MercExchange patented a design for an online marketplace in which a single company provides the trustworthy framework within which buyers and sellers can negotiate for goods. After negotiations with eBay and Half.com to license the patent failed, MercExchange brought suit in federal district court alleging patent violation under the Patent Act. The jury sided with MercExchange, ruling that its patent had been violated, but the district court judge refused to issue a permanent injunction. The injunction would have forced eBay and Half.com to stop using the contested framework, but the judge applied the traditional four-part test to determine whether an injunction was necessary and found that it was not. That decision was reversed, however, by the U.S. Circuit Court of Appeals for the Federal Circuit, which applied a "general rule that courts will issue permanent injunctions against patent infringements absent exceptional circumstances."

Gottschalk v. Benson

Engineers Gary Benson and Arthur Tabbot invented a faster and more efficient mathematical procedure for transforming the normal "decimal" type of numbers (base 10) into true "binary" numbers (base 2) which are simpler to process within computers. Their mathematical procedure was somewhat akin to long division, albeit with different steps. Their attorney argued before the patent examiner that the inventors were entitled to a broad patent covering any use of their new mathematical procedure, even use of it by a human using pencil and paper. The examiner rejected their invention. An appellate court overruled the examiner and ordered a patent to issue. The Commissioner of Patents then petitioned successfully to have the Supreme Court review this decision. Before the Supreme Court, the inventors' attorney backed down from his earlier position and argued that the inventors were entitled to a patent covering all uses of their new mathematical procedure in computers, but not necessarily to its use by humans using pencil and paper. (The members of the Supreme Court at that time knew very little about computers.)

Lotus Development Corporation v. Borland International, Inc.

Lotus Development Corporation (Lotus) copyrighted a computer spreadsheet program called Lotus 1-2-3. The program's menu options were arranged in a specific menu command hierarchy. Lotus 1-2-3 also allowed users to write "macros," which designate a certain series of commands to be executed with a single keystroke. Competing software-company Borland International, Inc. (Borland) released a similar program called Quattro that contained a program called "Key Reader." Lotus claimed that Key Reader infringed on its copyright because it copied Lotus 1-2-3 macros and arranged them according to the Lotus 1-2-3 menu command hierarchy. Borland explained that it did this to allow users already familiar with Lotus 1-2-3 to also operate Quattro and argued that the Lotus menu command hierarchy did not constitute copyright-protected material.

After the District Court ruled in favor of Lotus, Borland appealed to the U.S. Court of Appeals for the First Circuit. The First Circuit reversed, holding that the command menu hierarchy was a "method of operation" - a category excluded from copyright protection under 17 U.S.C.102(b).

Parker v. Flook

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