Granted Patent
Utility
US 5,974,877 · App. 08/641,541
Sight window assembly and method of forming same
Inventor:
Ralph D. Burgess, Jr.
Patented Case
View Patent ↗
Granted: Nov 2, 1999
Filed: May 1, 1996
Inventor
Ralph D. Burgess, Jr.
Assignee (at issue)
Food Engineering 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.