Granted Patent
Utility
US 5,274,473 · App. 07/809,032
Rapid variable angle digital screening
Inventors:
Robert Kidd, J. Brett Lefebvre
Patented Case
View Patent ↗
Granted: Dec 28, 1993
Filed: Dec 16, 1991
Inventors
Robert Kidd
J. Brett Lefebvre
Assignee (at issue)
Intergraph Corporation
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.