Granted Patent
Utility
US 6,186,638 · App. 09/411,298
Wrench which includes flashlight
Inventor:
Kao-Huo Chang
Patented Case
View Patent ↗
Granted: Feb 13, 2001
Filed: Oct 4, 1999
Inventor
Kao-Huo Chang
Assignee (at issue)
AWI Acquisition Company
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.