From their website:

1993, EDIG intoduced the 1st digital voice recorder w/MicrosOS.

In 1996, EDIG introduced the DVR for interface, for downloading and maganging to the PC.

Patent portfolio is protected from 2014 - 2016.

That's 21 years for MicroOS and 20 for the latter.

There are 5 patents.

Could this mean thay have already done the extention, or does this mean they got their 20 and can file for an extention past that?