Siemens AG v. Seagate Technology
Published: Jun. 20, 2009 | Result Date: Jan. 8, 2009 | Filing Date: Jan. 1, 1900 |Case number: 06CV00788(JVS) Verdict – Defense
Court
USDC Central
Attorneys
Plaintiff
Brandon C. Fernald
(Fernald Law Group APC)
Defendant
Calvin L. Litsey
(Faegre, Baker & Daniels LLP)
David J.F. Gross
(Faegre, Drinker, Biddle & Reath LLP)
Experts
Plaintiff
Sheldon L. Glashow
(technical)
Harry Manbeck
(technical)
Walter Bratic
(technical)
Defendant
Christopher H. Bajorek
(technical)
Caroline Ross
(technical)
Mark E. Nusbaum
(technical)
John C. Jarosz
(technical)
Shan Wang
(technical)
Facts
United States Patent No. 5,686,838 was issued on Nov. 11, 1997 for an invention called "Magnetoresistive Sensor Having at Least a Layer System and a Plurality of Measuring Contacts Disposed Thereon, and a Method of Producing the Sensor". This patent was assigned to plaintiff Siemens AG. Plaintiff alleged that defendant Seagate Technology's hard disk drives utilizing Giant Magneto Resistance (GMR) or Tunneling Giant Magneto Resistance (TGMR) read heads with an Artificial Antiferromagnet (AAF) infringed upon this patent.
Result
The district court granted summary judgment of non-infringement to defendant Seagate on the allegations relating to TGMR read heads. The jury issued a verdict for defendant Seagate on the remaining allegations, finding that the asserted claims of the patent were anticipated and rendered obvious by a prior invention by IBM, and further rendered obvious by other prior art.
Other Information
Siemens has appealed the case to the Federal Circuit. FILING DATE: April 23, 2007.
Length
18 days
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