Granted Patent
Utility
US 4,407,650 · App. 06/365,696
Adjustable seal for glass sheet furnace
Inventor:
Robert J. Greenler
Patented Case
View Patent ↗
Granted: Oct 4, 1983
Filed: Apr 5, 1982
Inventor
Robert J. Greenler
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.