Granted Patent
Utility
US 5,514,519 · App. 08/224,503
Production of three-dimensional objects
Inventor:
Douglas C. Neckers
Patented Case
View Patent ↗
Granted: May 7, 1996
Filed: Apr 7, 1994
Inventor
Douglas C. Neckers
Assignee (at issue)
Spectra Group Limited, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.