[zeromq-dev] LGPLv3 patent clause

Laurent Alebarde l.alebarde at free.fr
Thu Jan 30 14:11:03 CET 2014

Hi James,

As far as I have understood it, if you modify libzmq with some great 
feature you pattent, then you are implicitly giving freely a licence to 
all users of your libzmq version. But if your patent is on an 
application of yours that makes use of libzmq, then it is alright.

With reserves since I am not a legal expert.


Le 30/01/2014 11:29, Sojan James a écrit :
> Hello All,
> Apologies if this is not the right list for this topic. I have gone 
> through the FAQs and understand the licensing terms of zeromq. I also 
> understand that it will not be re licensed.
> I think zeromq is a great library to use for my project.  At my 
> company, all open source usage needs to be approved for use by a legal 
> team.  Usage of GLPv3 and LGPLv3 is flatly refused. One of the reasons 
> is the clause about the patents.  I don't fully understand the 
> implications of the patent clause of LGPLv3 w.r.t zeromq.  Does the 
> static linking exception affect my obligations in any way?
> I'm basically looking for any information that I can provide to the 
> legal team to discuss further if an exception can be granted for this 
> library.
> Thank you in advance!
> Regards,
> Sojan
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> zeromq-dev at lists.zeromq.org
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