Granted Patent
Utility
US 4,487,276 · App. 06/374,177
Scale of flat construction
Inventors:
Burt L. Swersey, Peter Fried
Patented Case
View Patent ↗
Granted: Dec 11, 1984
Filed: May 3, 1983
Inventors
Burt L. Swersey
Peter Fried
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.