Paul Preziosi wrote:

> "Roeland M.J. Meyer" wrote:
> >
> > I think I mis-read your original question. For some reason I read
> > "unusable", sorry. Yes, the lapse of a patent means the technology
> > becomes available for all to use, freely. This is my understanding.
>
>  The idea behind patents is kind of contract:
>
>  - The government grants a legal protection to the registrant,
>    for a given time period,
>
>  - In return, the registrant releases it's technology to public
>    domain at the end of this time period.

This is the spirit. Another aspect of the system is, details of the
technology must be public, even during the patent's validity (during which
the governments grants the creator a right to charge people for using the
technology even when they do it without the creator's help). This is to
optimize the balance between compensation to the creator and spreading the
benefits of the technology.

But then there's the Dark Side of the Force... (correct me if I'm wrong
about the facts)

The NSA bullied the patent agencies into accepting a monstrosity called a
"blind patent", in which the NSA creates a technology, files its details to
the patent agency which is not allowed to make it public (perversion #1),
and if someone manages to build up something similar from scratch -
effectively reinventing it with all merits - the document pops up and the
patent is enforced (perversion #2). Worse, the expiration clock start to
tick at THAT moment, not when the original paper was filed (perversion #3).

Is it really how things happen? I find it hard to believe.
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