[idk1]

From what I understand, in the inkjet market the inkjet printer firms own the inkjet patents, which means it's not possible to disrupt the market.

[didgeoridoo]

Patents have a lifetime of 20 years. I’d take an open source 2002 printer, but I doubt it’s economical for anyone to make and sell one.

[rosnd]

Inkjets are also super complicated to build, regardless of the patents there's a very high barrier to entry.