Gary Shannon wrote: > On Tue, Sep 22, 2009 at 8:49 AM, Jim Henry <[log in to unmask]> wrote: >> �One method I've heard recommended is to mail >> yourself a copy of your work and put it away somewhere unopened; if >> your claim to prior art is ever challenged, you can have the postmark >> examined and the enveloped openened in the presence of a sufficient >> number of disinterested witnesses, or maybe in court. > > A lawyer friend once told me this is worthless. You could have mailed > yourself an unsealed empty envelope at an earlier date, hoping > something would come along that you thought was worth stealing, and > and then put anything into it at a later date and then sealed it up. You could easily flip the envelope over so the postmark covers the flap. You'd also need to seal it an a manner that shows no tampering because a regular envelope can still be steamed open.