In August 2010, Oracle sued Google for $6.1bn on grounds that the search company's popular Android system infringed the Java patents Oracle had acquired when it bought Sun Microsystems earlier that year. The action also alleged copyright infringement.
In a court filing yesterday, Oracle said that its initial damages claim actually "mischaracterised" a report by its damages expert Iain Cockburn, a Boston University business professor.
The firm is instead seeking around $1.16bn in the case, which is estimated at one-fifth of the maximum $6.1 billion that Oracle had earlier sought in the case, reports Reuters.
A trial is set to begin on October 31 before US District Judge William Alsup in San Francisco.
The same judge had on July 22 rejected Oracle's request for up to $6.1 billion in damages, but gave the company a chance to revise its claim.
In a letter sent to Alsup, Oracle lawyer Steven Holtzman said that the revised damages includes around $202 million for patent infringement, and as much as $960 million for copyright infringement.
Holtzman also urged the judge to deny Google's request to exclude parts of Cockburn's damages report from the case.
The lawsuit is one of several such actions between smartphone and mobile software companies, as the battle for the massive phone and tablet market intensifies.
Last week, Apple launched a lawsuit against Samsung in the UK, marking the latest action in a long-running legal row between the two technology giants.
Apple is also locked in a patent war with HTC, and the Taiwanese firm recently lodged fresh papers against Apple after it acquired new patents from Google.