In recent years, the innovation market has witnessed a new business model involving companies that are mere patent holding shells and not operating entities. They have no customers or products to offer, but they do have an aggressive tactic of using patent portfolios to threaten other operating...

Economists generally agree that innovation is important to economic growth and that government support for innovation is necessary. Historically, the U.S. government has supported innovation in a variety of ways: (1) a strong legal system for patents; (2) direct support through research...