Venture capitalists are warning that the increasing number of patent battles is damaging technology start-ups, with legal cases threatening to drive smaller companies out of business.
The focus has gone on patents with Google's US$12.5 billion ($15 billion) deal to buy Motorola's mobile phone business. Analysts pointed to the strength of Motorola's intellectual property as crucial to the acquisition.
As major companies are investing in protecting themselves as the patent wars heat up, at the other end of the market technology start-ups and their backers fear for the future of companies that cannot fight back in the courts.
Nic Brisbourne, a partner at the venture capital company DFJ Esprit, said litigious patent owners were "holding the industry back. While it is more of a problem in the US, many British start-ups will be affected as they see it as a key market."
"It is really hard for small companies to figure out which patents exist in their field," Brisbourne said. "And many are really broad."