Maxwell Technologies, a developer and manufacturer of ultracapacitor products, has filed a patent infringement lawsuit against Nesscap, an ultracapacitor manufacturer based in Korea. The lawsuit alleges that Nesscap's ultracapacitors infringe Maxwell's patented intellectual property. Maxwell filed the lawsuit in the United States District Court for the Southern District of California. Maxwell is seeking monetary damages and an injunction to stop Nesscap's sales of infringing products.