Granted Patent
Utility
US 6,215,293 · App. 09/131,942
Portable stud detector for detecting wood, metal, and live wires
Inventor:
Ronald Tak Yan Yim
Patented Case
View Patent ↗
Granted: Apr 10, 2001
Filed: Aug 12, 1998
Inventor
Ronald Tak Yan Yim
Assignee (at issue)
Solar Wide Industrial Limited
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.