Granted Patent
Utility
US 4,975,561 · App. 07/319,260
Heating system for substrates
Inventors:
McDonald Robinson, Albert E. Ozias
Patented Case
View Patent ↗
Granted: Dec 4, 1990
Filed: Mar 3, 1989
Inventors
McDonald Robinson
Albert E. Ozias
Assignee (at issue)
Epsilon Technology 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.