Called the Partnership for American Innovation, the group warned that steps to stop the PAEs could also hurt truly innovative companies.

Companies signing on to the effort so far are Apple Inc., DuPont, Ford Motor Co., General Electric, IBM Corp, Microsoft Corp and Pfizer Inc.

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In particular, the group would oppose efforts to make software or biotechnology unpatentable.

Google, Cisco and other supporters of efforts to curb frivolous patent litigation from PAEs, often termed “patent trolls,” supported a bill that easily passed the U.S. House of Representatives in December.