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Stephen E. Zweig, PhD JD, Patent Attorney

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PTAB

Caution: Contingent Limitations

February 26, 2025February 25, 2025
Exploding device

If-Then logic is in most computerized inventions, but the Ex Parte Schulhauser case lets the examiner ignore the “Then” part in your … Read more

Categories Patents

Ex Parte Reexamination

February 15, 2021October 2, 2019
ex parte reexamination

Are you having problems with a patent that you believe is invalid? Know about uncited prior art? Consider filing a Patent Ex … Read more

Categories Litigation, Patents

Patent appeal process and procedures

February 15, 2021January 27, 2021

The patent appeal process allows an applicant to bypass an examiner and request that the Patent Trials and Appeal Board (PTAB) independently … Read more

Categories Patents

Sovereign Immunity, Tribes, & IPR

November 1, 2022September 10, 2017
tribal lands

Allergan proposed a strange way to help immunize US patents from IPR attack – the “sovereign immunity defense”. IPR attacks: The America Invents … Read more

Categories Litigation

Advantages of USPTO PTAB proceedings

January 29, 2023May 3, 2014
Gavel

When compared to European patent oppositions, PTAB methods look great because they employ a number of legal protections lacking in the European system.

Categories Litigation, Patents

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