Granted Patent
Utility
US 6,424,097 · App. 09/569,541
Projection lamp safety interlock apparatus and method
Inventors:
Henry Frazier Pruett, Gerald E. Duffy
Patented Case
View Patent ↗
Granted: Jul 23, 2002
Filed: May 12, 2000
Inventors
Henry Frazier Pruett
Gerald E. Duffy
Assignee (at issue)
INFOCUS 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.