One was issued when the summary determination was was allowed to be heard in the ITC. Would proving that HTC infringed in court be a material event worthy of an 8k.

Form 8-K is used to notify investors of a current event. These types of events include:

• Material definitive agreements not made in the ordinary course of business
• Bankruptcies or receiverships
• Director is elected
• Director departs
  • If a director departs because of a disagreement with the company on any matter relating to the registrant’s operations, policies, or practices then an 8-K must be filed to disclose a brief description of the circumstances representing the disagreement.[1]
• Asset movement: acquisition or sale
• Result of operations and financial condition
• Material Direct Financial obligations (bonds, debentures)
• Triggering events that accelerate material obligations (defaults on a loan)
• Exit or disposal plans
  • Layoffs
  • shutting down a plant
  • material change in services or outlets
• Material impairments
• Delisting or transfer exchange notices
• Unregistered equity sales
• Modifications to shareholder rights
• Change in accountant - and good idea to explain why
• SEC investigations and internal reviews
• Financial non-reliance notices
• Changes in control of the company
  • Someone takes a large equity position (more than 15%); shareholder also needs to file with SEC as to intent
  • Someone takes a 51% position
• Changes in executive management
  • Officer leaves
  • Officer is fired
  • Officer is hired
• Departure or appointment of company officers
• Amendments to company Governance Policies
  • Code of Ethics
  • Board Committee Governance Policies
• Trading suspension
• Change in credit
• Change in company status
• Other events
• Financial exhibits

Investors should always read any 8-K filings that are made by companies in which they are invested. These reports are both material and relevant to the company, and often contain information that will affect the share price