[Discuss] 3D printing patents

Michael Weinberg mweinberg at publicknowledge.org
Tue May 13 17:07:06 UTC 2014

To the extent that versions of this were documented "in the wild, " pulling
them together would be an incredibly worthwhile activity. If they do exist,
it would them we worth having a conversation about making sure that the
patent office also saw them sooner rather than later.
On May 13, 2014 12:50 PM, "Robert Cornell" <bobnet604 at gmail.com> wrote:

> Hello,
> RepRapPro have a blog post
> https://reprappro.com/2014/04/15/multimaterial-research/ and I've been
> playing with the idea.
> It's a better method that would make the patent mentioned irrelevant.
> When Stratasys took over MakerBot and they closed their design there was a
> lot of discussion about how they cashed out
> on open source efforts. I suppose something like this was inevitable.
> I can't recall seeing this exact method before so maybe they did 'invent'
> it. I'm going to read the patent and dig into the archives.
> Rob
> --
> openpart.co.uk
> On 13 May 2014 17:28, Matt Maier <blueback09 at gmail.com> wrote:
>> What do y'all think about this?
>> http://3dprint.com/3187/makerbot-3d-printer-invention/
>> *"Makerbot has invented a new type of process which, if it works
>> properly, will allow 3D printers to change build material mid print.  They
>> have filed a patent to protect this solution over a year and a half ago,
>> but just recently was it published for the public to see, and 3DPrint.com
>> has uncovered it."*
>> *"The multiple materials would be fed into their individual feeds, which
>> are connected to a filament changer (or build material changer).  The
>> filament changer would be able to slide the extrusion head from material to
>> material, in a fluent motion.  It would also consist of a blade or other
>> cutting edge, that would cut the 1st material before proceeding to the
>> second"*
>> *"It covers them for other types of print processes other than FDM, and
>> also allows for two separate extruders to be alternately positioned along
>> the tool path for a similar effect..."*
>> It seems like this patent is exactly the sort of thing the community has
>> been discussing. Did Makerbot really invent this, or are they trying to
>> patent something that the open source community developed first? Is this an
>> example of the sort of thing we'd want to respond to in a structured way,
>> like doing the prior art search on behalf of the USPTO and pushing the
>> results to them?
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