The patent, which cites specific weaknesses in GoPro's cameras, includes details about a camera system that can be mounted on bike helmets or scuba masks, Patently Apple reported.
              
GoPro's shares fell nearly 9 percent after the report.

Patent risk management company RPX Corp had earlier said it would buy patents owned by Apple Inc and other firms for $900 million, helping to further scale back lawsuits over smartphone technology.

The sale consists of the more than 4,000 patents still owned by Rockstar Consortium, which was formed from the $4.5 billion purchase of about 6,000 Nortel Network Corp patents in 2011 following its bankruptcy.
               
The deal puts an end to litigation started last year by Rockstar against several handset manufacturers whose phones operate on Google Inc's Android operating system, which fiercely competes with Apple mobile products.
               
While the sale price is far less than what Rockstar had paid for the original 6,000 patents, the most valuable 2,000 of them had already been distributed to consortium members, RPX Chief Executive John Amster said.
 
The deal was partly motivated by the Rockstar owners rethinking their strategy for the patents, Amster said, noting that he expects Rockstar will cease to exist in its current form after the sale.
               
RPX was formed primarily to buy patents before the sellers can be sued for infringement. The sellers pay RPX a fee that it says is cheaper than the cost of fighting the patents in court.
               
As part of the deal, RPX also said it will license the patents to more than 30 companies, including Google and Cisco Systems Inc, both of which last November settled patent lawsuits filed against them by Rockstar.
               
Besides Apple, Rockstar also includes Microsoft Corp, Sony Corp, Blackberry and Ericsson.