How to update a patent you own and what happens if it's being re-examined.
If you own a patent that you believe is defective or not working or that contains errors and does not fulfill the intent of the applicant, you can apply to have the patent reissued. A patent can be reissued within 4 years of being granted.
If you own a patent in which you believe that the specification was made too broad, you can apply for a disclaimer to narrow the scope of some or all of its claims. Disclaimers can be added at any time after a patent is granted.
Read chapter 29: Disclaimer in the MOPOP for details