Granted Patent
Utility
US 6,135,780 · App. 09/443,261
Dual function lamp socket
Inventors:
H. Edward Kelwaski, Robert D. Dannenberg
Patented Case
View Patent ↗
Granted: Oct 24, 2000
Filed: Nov 22, 1999
Inventors
H. Edward Kelwaski
Robert D. Dannenberg
Assignee (at issue)
Navistar International Transportation
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.