Granted Patent
Utility
US 4,554,437 · App. 06/611,108
Tunnel oven
Inventors:
Dennis L. Wagner, Harold D. Wells
Patented Case
View Patent ↗
Granted: Nov 19, 1985
Filed: May 17, 1984
Inventors
Dennis L. Wagner
Harold D. Wells
Assignee (at issue)
Pet-Ag, 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.