Symposium members applauded the paper but said future work should take into account a broader set of players, such as Qualcomm and other smartphone component makers.
Among 111 smartphone suits, Apple brought the most cases involving the most patents, but few considered standards-essential patents.
"Including Qualcomm would not have changed results, because it only had [smartphone] suits with Nokia, which were settled without injunctions," Gupta said. "Even a much larger data set would not make that much of a change in the findings."
Nevertheless, she said she may work on a study involving the 347 companies that participated in the 3GPP cellular standards process; she participated in those meetings as an engineer. She said 240 of those companies declared no SEPs as part of the process and made few or no proposals.
Cellular patents are increasingly in the hands of a handful of companies. Gupta gave 2010 figures from ETSI patent declarations that put Qualcomm at the top of the list (with 6,032 cellular patents), followed by Nokia (4,397), Motorola Mobility (3,800), Interdigital (3,730), Ericsson (2,023) and Huawei (1,483).
Several attendees encouraged Qualcomm to conduct broader followup studies focused on cellular intellectual property, which is said to be growing by more than 600 patents a year. The studies should include players ranging from service operators such as AT&T to small companies and trolls, they said.
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