PTSC has probably twice as many shares outstanding.

PTSC gave away tens of millions of dollars in dividends.

A PTSC investor had millions upon millions of shares to sell into good news and made 10s of millions of dollars while deflating the share price.

PTSC's patents are under review by USTPO.

PTSC dropped their only product, though they have now purchased and invested in other companies, and that appears to be influencing the share price in a positive way.

etc...

The only commonality is that they both hold patents that are being infringed upon.

Edig will not perform in the same way as PTSC, even discounting the above.

All to the best of my memory and IMHO.

imin