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David Eiseman founded Quinn Emanuel’s Northern California office in 1997.  His practice focuses on intellectual property litigation and other complex business litigation in the federal and state courts.  Mr. Eiseman has represented clients in a wide array of patent, copyright and trademark infringement matters, as well as trade secret misappropriation, antitrust and unfair competition litigation.  In addition to litigation, he regularly counsels clients regarding intellectual property and business litigation issues. 

Since joining Quinn Emanuel, Mr. Eiseman has litigated a substantial number of patent cases, including cases for Vishay Siliconix, Oracle, Johnson & Johnson subsidiaries LifeScan and ALZA, Vishay Japan, Seiko-Epson, CFM Technologies and ZiLOG.  He has tried patent cases to verdict successfully in the semiconductor, biotechnology and pharmaceutical fields.  He has also resolved patent cases successfully prior to trial by way of summary judgment or by way of settlement following favorable claim construction rulings or other pretrial proceedings in the computer software, semiconductor, information technology, medical device and biotechnology fields. 

In the medical device and pharmaceutical fields, he has represented Johnson & Johnson, GE Healthcare and AccessClosure. 

In the computer software and hardware fields, he has represented Oracle, IBM and J.D. Edwards. 

In the semiconductor field, he has represented Vishay Siliconix and ZiLOG. 

In the communications and information technology fields, he has represented Charter Communications and Seiko-Epson.

Represented Pharmacia in a patent infringement case in which a competitor alleged that Pharmacia had infringed a patent covering the purification of monoclonal antibodies.  After a three-week trial, the jury ruled in Pharmacia’s favor, finding the patent at issue invalid and not infringed. 

Represented CFM Technologies in a patent infringement case alleging infringement of CFM Technologies’ patents covering methods of drying semiconductor wafers during the manufacturing process.  After a two-week trial on liability issues, the jury found CFM Technologies’ patents valid and infringed and the case then settled on favorable terms. 

Represented ALZA in a patent inventorship dispute in which two individuals claimed that they were the inventors of an ALZA patent covering liposomes used for the targeted delivery of pharmaceuticals.  After a one-week bench trial, the district court rejected the claim of inventorship and entered judgment in favor of ALZA. 

Represented Siliconix in a series of patent infringement cases alleging infringement of Siliconix’s patents covering Trench MOSFET semiconductor technology.  After Siliconix obtained favorable claim construction rulings, the cases settled on favorable terms. 

Represented Seiko-Epson in a patent infringement case alleging infringement of Seiko-Epson’s patents covering ink cartridge technology.  The district court granted Seiko-Epson’s motion for summary judgment, finding the patents valid and infringed.  The case then settled on favorable terms. 

Represented Vishay Intertechnology Asia and Vishay Japan in two patent infringement cases in the Tokyo District Court in which Vishay Intertechnology Asia and Vishay Japan were accused of infringing Japanese patents covering Trench MOSFET semiconductor technology.  After obtaining a series of positive pretrial rulings, the cases settled on favorable terms. 

Represented Phoenix Technologies in a trade secret case involving software for use in desktop computers, servers and embedded systems.  Phoenix Technologies obtained a temporary restraining order at the time it filed its complaint, and defendant later stipulated to a permanent injunction. 

Represented J.D. Edwards in a copyright infringement case involving wholesale distribution software.  After the district court granted J.D. Edwards’ partial motion to dismiss based on an implied license theory, the case settled on favorable terms. 

Represented Union Bank of California in a trademark infringement case against involving the use of print media and the Internet.  At the time it filed its complaint, Union Bank of California sought and obtained a temporary restraining order.  Defendants later stipulated to a permanent injunction. 

Represented LifeScan in a trademark infringement case arising out of two competitors' dissemination of fraudulent letters relating to LifeScan's products. LifeScan obtained a permanent injuction and damages judgment.