Magma Design Automation Inc. said Friday the Patent and Trademark Office has agreed to re-examine the third and final patent at issue in a lawsuit between the semiconductor design software maker and larger rival Synopsys Inc.

The company said the office found substantial new questions over all 54 of the patent’s claims and ordered the reexamination on Jan. 10. According to Magma, the office has already ordered reexamination of the other two patents at issue.