Granted Patent
Utility
US 4,465,238 · App. 06/299,468
Filter for hot air nozzle
Inventors:
Jhina U. Patel, James P. Van Sweringen
Patented Case
View Patent ↗
Granted: Aug 14, 1984
Filed: Sep 4, 1981
Inventors
Jhina U. Patel
James P. Van Sweringen
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.