Acceptable patent license for free software?

[zBog BIV]

Hello

I had an idea about a patent license some time ago, but I didn't have the
time to express it in a meaningful way.

I'll make an attempt here.
My idea starts with the question: is it possible to "copyleft" a patent?
(I know copyleft is derived from copyright != patent system) But still, I
view copyleft as a philosophy so ...

Can someone license the use of a patent to others as long they don't try to
enforce their own patents ?




-- 
"The best way to predict the future is to invent it.", 1971, Alan Kay:
http://www.smalltalk.org/alankay.html
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