sentences:  Each patent list is audited (for example as to whether potential inclusions are mere 'evergreening' attempts) by the Office of Patented Medicines and Liaison.Reports produced by that body outline statistics relating to the maintenance of the Patent Register, including the number of patents filed, the number of patents accepted and rejected, and litigation resulting from the acceptance or rejection of patents for listing on the Patent Register.In October 2006, the Canadian federal government recognized that some brand-name companies had been abusing the NOC Regulations.