The us5597520 tag has no wiki summary.
2
votes
2answers
216 views
At what point can a patent lawsuit become reality?
Related to this question on 3D Systems patent expiry, it appears that 3D Systems are raising a patent infringement lawsuit on the basis that Kickstarter and Formlabs:
knew or should have known ...
2
votes
1answer
323 views
Expiration date of US5597520
Can 3DSystems sue Formlabs over US Patent 5597520? If it was issued in 1997, wouldn't it have expired in 2007?
