PATENT on 3d printer

[Andreyp1986]

Hello.
There are lots of 3d printers that print 3d objects, probably some of them are with patents.
If I invent a 3d printer that "extends" known printer with several features, may I use it to print and sell 3d objects without doing patent?

[Brad]

It is not possible to answer this question.  You would have to look at all of the patents which are currently active and cover 3D printing, then, look at each claim in those patents to see if your new printer infringes on any of those claims.

There are patent attorneys who will do this work for you and give you a "freedom to operate opinion" but they can be expensive (usually $1,000+ depending on how many patents they have to review).