Granted Patent
Utility
US 5,085,580 · App. 07/621,028
Preheater for flat glass sheets
Inventor:
Pauli T. Reunamaki
Patented Case
View Patent ↗
Granted: Feb 4, 1992
Filed: Nov 30, 1990
Inventor
Pauli T. Reunamaki
Assignee (at issue)
Glasstech, 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.